diff --git a/packages/ui/src/components/base/Toggle.vue b/packages/ui/src/components/base/Toggle.vue
index a44ef755d4..1de36dc648 100644
--- a/packages/ui/src/components/base/Toggle.vue
+++ b/packages/ui/src/components/base/Toggle.vue
@@ -3,12 +3,12 @@
 		:id="id"
 		type="button"
 		role="switch"
-		:aria-checked="modelValue"
+		:aria-checked="indeterminate ? 'mixed' : modelValue"
 		:disabled="disabled"
 		class="group inline-flex shrink-0 touch-manipulation items-center rounded-full m-0 p-1 transition-all duration-200 cursor-pointer border-none"
 		:class="[
 			small ? 'h-5 !w-[40px]' : 'h-6 !w-[48px]',
-			modelValue ? 'bg-brand' : 'bg-button-bg',
+			indeterminate || modelValue ? 'bg-brand' : 'bg-button-bg',
 			disabled ? 'opacity-50 cursor-not-allowed' : '',
 		]"
 		@click="toggle"
@@ -16,14 +16,21 @@
 		<span
 			class="rounded-full transition-all duration-200"
 			:class="[
-				small ? 'w-3 h-3' : 'w-4 h-4',
-				modelValue
+				indeterminate
 					? small
-						? 'translate-x-[20px] bg-black/90'
-						: 'translate-x-[24px] bg-black/90'
-					: 'bg-gray',
+						? 'h-0.5 w-2.5 translate-x-[11px] bg-black/90'
+						: 'h-0.5 w-3 translate-x-[14px] bg-black/90'
+					: modelValue
+					? small
+						? 'h-3 w-3 translate-x-[20px] bg-black/90'
+						: 'h-4 w-4 translate-x-[24px] bg-black/90'
+					: small
+						? 'h-3 w-3 bg-gray'
+						: 'h-4 w-4 bg-gray',
 				disabled
 					? ''
+					: indeterminate
+						? 'group-hover:scale-x-110 group-active:scale-x-75'
 					: small
 						? 'group-hover:w-[14px] group-hover:h-[14px] group-hover:m-[-1px] group-active:w-[10px] group-active:h-[10px] group-active:m-[1px]'
 						: 'group-hover:w-[18px] group-hover:h-[18px] group-hover:m-[-1px] group-active:w-[14px] group-active:h-[14px] group-active:m-[1px]',
@@ -37,6 +44,7 @@ const props = defineProps<{
 	id?: string
 	disabled?: boolean
 	small?: boolean
+	indeterminate?: boolean
 }>()
 
 const modelValue = defineModel<boolean>()
diff --git a/packages/ui/src/layouts/shared/content-tab/components/ContentCardItem.vue b/packages/ui/src/layouts/shared/content-tab/components/ContentCardItem.vue
index d258c5ac2b..e3015f9ffc 100644
--- a/packages/ui/src/layouts/shared/content-tab/components/ContentCardItem.vue
+++ b/packages/ui/src/layouts/shared/content-tab/components/ContentCardItem.vue
@@ -54,6 +54,10 @@ const messages = defineMessages({
 		id: 'content.card.frozen',
 		defaultMessage: 'This project is locked to its current version until unfrozen.',
 	},
+	useEnabledForControls: {
+		id: 'content.card.use-enabled-for-controls',
+		defaultMessage: 'Use the Enabled for controls to enable or disable this content.',
+	},
 })
 
 interface Props {
@@ -137,7 +141,20 @@ const versionNumberRef = ref<HTMLElement | null>(null)
 const fileNameRef = ref<HTMLElement | null>(null)
 
 const isDisabled = computed(() => props.disabled || props.installing)
-const isToggleDisabled = computed(() => isDisabled.value || props.toggleDisabled)
+const isToggleIndeterminate = computed(
+	() =>
+		props.enabledFor !== undefined && props.enabledFor.server !== props.enabledFor.player,
+)
+const isToggleDisabled = computed(
+	() => isDisabled.value || props.toggleDisabled || isToggleIndeterminate.value,
+)
+const toggleTooltip = computed(() => {
+	if (isToggleIndeterminate.value) {
+		return formatMessage(messages.useEnabledForControls)
+	}
+	if (!isToggleDisabled.value) return undefined
+	return props.toggleDisabledTooltip ?? props.disabledTooltip ?? undefined
+})
 const isEnabledForDisabled = computed(() => !props.enabledFor?.server && !props.enabledFor?.player)
 
 const clientWarningMessage = computed(() => {
@@ -368,7 +385,7 @@ const installTooltip = computed(() => {
 		<div
 			v-if="!hideActions"
 			class="flex shrink-0 items-center justify-end gap-2 transition-colors duration-200"
-			:class="enabledFor ? 'w-[112px]' : 'min-w-[160px]'"
+			:class="enabledFor ? 'w-[168px]' : 'min-w-[160px]'"
 		>
 			<slot name="additionalButtonsLeft" />
 
@@ -431,14 +448,11 @@ const installTooltip = computed(() => {
 			</div>
 
 			<Toggle
-				v-if="enabled !== undefined && !hideToggle && !enabledFor"
-				v-tooltip="
-					isToggleDisabled && (toggleDisabledTooltip || disabledTooltip)
-						? (toggleDisabledTooltip ?? disabledTooltip)
-						: undefined
-				"
+				v-if="enabled !== undefined && !hideToggle"
+				v-tooltip="toggleTooltip"
 				:model-value="enabled"
 				:disabled="isToggleDisabled"
+				:indeterminate="isToggleIndeterminate"
 				:aria-label="project.title"
 				class="my-auto"
 				@update:model-value="(val) => emit('update:enabled', val as boolean)"
diff --git a/packages/ui/src/layouts/shared/content-tab/components/ContentCardTable.vue b/packages/ui/src/layouts/shared/content-tab/components/ContentCardTable.vue
index 33ef0c0563..bb65ea0a4b 100644
--- a/packages/ui/src/layouts/shared/content-tab/components/ContentCardTable.vue
+++ b/packages/ui/src/layouts/shared/content-tab/components/ContentCardTable.vue
@@ -24,8 +24,7 @@ const messages = defineMessages({
 	},
 	enabledForDescription: {
 		id: 'content.enabled-for.description',
-		defaultMessage:
-			'Choose whether this content runs on the server, is sent to players, or is disabled in both places.',
+		defaultMessage: 'Choose where this content is enabled. Turn both off to disable it.',
 	},
 })
 
@@ -300,7 +299,7 @@ function handleSort(column: ContentCardTableSortColumn) {
 				v-if="hasAnyActions"
 				role="columnheader"
 				class="shrink-0 text-right"
-				:class="hasEnabledForColumn ? 'w-[112px]' : 'min-w-[160px]'"
+				:class="hasEnabledForColumn ? 'w-[168px]' : 'min-w-[160px]'"
 			>
 				<span class="font-semibold text-secondary">{{
 					formatMessage(commonMessages.actionsLabel)
diff --git a/packages/ui/src/layouts/shared/content-tab/components/ContentEnabledFor.vue b/packages/ui/src/layouts/shared/content-tab/components/ContentEnabledFor.vue
index 51c0ad126f..f1e5a0fe38 100644
--- a/packages/ui/src/layouts/shared/content-tab/components/ContentEnabledFor.vue
+++ b/packages/ui/src/layouts/shared/content-tab/components/ContentEnabledFor.vue
@@ -17,7 +17,15 @@ const messages = defineMessages({
 	},
 	locked: {
 		id: 'content.enabled-for.locked',
-		defaultMessage: 'Unlock the environment controls from the row menu to change this selection.',
+		defaultMessage: 'These choices are locked. Select Unlock from the row menu to change them.',
+	},
+	requiredHere: {
+		id: 'content.enabled-for.required-here',
+		defaultMessage: 'This content needs to be enabled here to work correctly.',
+	},
+	notSupportedHere: {
+		id: 'content.enabled-for.not-supported-here',
+		defaultMessage: "This content isn't designed to be enabled here.",
 	},
 })
 
@@ -50,6 +58,12 @@ function isDisabled(side: ContentSide) {
 	return props.disabled || disabledSides.value.has(side)
 }
 
+function getDisabledTooltip(side: ContentSide) {
+	if (props.disabled) return props.disabledTooltip
+	if (!disabledSides.value.has(side)) return undefined
+	return formatMessage(isSelected(side) ? messages.requiredHere : messages.notSupportedHere)
+}
+
 function toggle(side: ContentSide) {
 	if (isDisabled(side)) return
 	emit('update:model-value', side, !isSelected(side))
@@ -61,11 +75,7 @@ function toggle(side: ContentSide) {
 		<button
 			v-for="side in sides"
 			:key="side"
-			v-tooltip="
-				isDisabled(side)
-					? (disabledTooltip ?? modelValue.disabledTooltip ?? formatMessage(messages.locked))
-					: undefined
-			"
+			v-tooltip="getDisabledTooltip(side)"
 			type="button"
 			class="flex h-8 items-center rounded-xl border border-solid px-3 text-sm font-medium transition-[background-color,border-color,color,opacity,transform] duration-100 focus-visible:outline-none focus-visible:ring-4 focus-visible:ring-brand-shadow"
 			:class="[
diff --git a/packages/ui/src/layouts/shared/content-tab/components/managed-content-modal/index.vue b/packages/ui/src/layouts/shared/content-tab/components/managed-content-modal/index.vue
index be339da6ea..ce71d43306 100644
--- a/packages/ui/src/layouts/shared/content-tab/components/managed-content-modal/index.vue
+++ b/packages/ui/src/layouts/shared/content-tab/components/managed-content-modal/index.vue
@@ -119,8 +119,7 @@ const messages = defineMessages({
 	},
 	enabledForDescription: {
 		id: 'content.enabled-for.description',
-		defaultMessage:
-			'Choose whether this content runs on the server, is sent to players, or is disabled in both places.',
+		defaultMessage: 'Choose where this content is enabled. Turn both off to disable it.',
 	},
 	pleaseWait: {
 		id: 'content.enabled-for.please-wait',
@@ -300,7 +299,7 @@ const tableItems = computed<ContentCardTableItem[]>(() =>
 					link: item.source.link ?? sourceProjectLink(item.source.project),
 				}
 			: undefined,
-		...(props.enableToggle ? { enabled: item.enabled } : {}),
+		...(props.enableToggle || props.enableEnabledFor ? { enabled: item.enabled } : {}),
 		...(props.enableEnabledFor ? { enabledFor: item.enabledFor } : {}),
 		locked: item.locked,
 		installing: item.installing === true,
@@ -638,7 +637,7 @@ defineExpose({ show, showLoading, hide, getState, restore, updateItem, setItems
 						<div
 							v-if="showTableActions"
 							class="shrink-0 text-right"
-							:class="props.enableEnabledFor ? 'w-[112px]' : 'min-w-[160px]'"
+							:class="props.enableEnabledFor ? 'w-[168px]' : 'min-w-[160px]'"
 						>
 							<span class="font-semibold text-secondary">{{
 								formatMessage(commonMessages.actionsLabel)
@@ -656,7 +655,7 @@ defineExpose({ show, showLoading, hide, getState, restore, updateItem, setItems
 							hide-header
 							flat
 							v-on="
-								props.enableToggle
+								props.enableToggle || props.enableEnabledFor
 									? { 'update:enabled': (id: string, val: boolean) => handleEnabledChange(id, val) }
 									: {}
 							"
diff --git a/packages/ui/src/layouts/shared/content-tab/layout.vue b/packages/ui/src/layouts/shared/content-tab/layout.vue
index 4ce8cb0453..d5a5f34982 100644
--- a/packages/ui/src/layouts/shared/content-tab/layout.vue
+++ b/packages/ui/src/layouts/shared/content-tab/layout.vue
@@ -754,7 +754,7 @@ async function confirmDisable() {
 	if (itemsToDisable.length === 1) {
 		const item = itemsToDisable[0]
 		const id = getItemId(item)
-		markChanging(id)
+		if (!item.enabledFor) markChanging(id)
 		try {
 			if (ctx.bulkDisableItems) {
 				await ctx.bulkDisableItems(itemsToDisable)
@@ -762,7 +762,7 @@ async function confirmDisable() {
 				await ctx.toggleEnabled?.(item)
 			}
 		} finally {
-			unmarkChanging(id)
+			if (!item.enabledFor) unmarkChanging(id)
 		}
 		return
 	}
@@ -781,11 +781,11 @@ async function handleToggleEnabledById(id: string, _value: boolean) {
 		await promptDisableItems([item])
 		return
 	}
-	markChanging(id)
+	if (!item.enabledFor) markChanging(id)
 	try {
 		await ctx.toggleEnabled(item)
 	} finally {
-		unmarkChanging(id)
+		if (!item.enabledFor) unmarkChanging(id)
 	}
 }
 
@@ -844,12 +844,7 @@ async function handleSetEnabledForById(
 	const item = ctx.items.value.find((candidate) => getItemId(candidate) === id)
 	if (!item) return
 
-	markChanging(id)
-	try {
-		await ctx.setEnabledFor(item, side, enabled)
-	} finally {
-		unmarkChanging(id)
-	}
+	await ctx.setEnabledFor(item, side, enabled)
 }
 
 // Bulk updating
diff --git a/packages/ui/src/layouts/shared/content-tab/types.ts b/packages/ui/src/layouts/shared/content-tab/types.ts
index 086a7abeec..fb94798f5d 100644
--- a/packages/ui/src/layouts/shared/content-tab/types.ts
+++ b/packages/ui/src/layouts/shared/content-tab/types.ts
@@ -57,7 +57,6 @@ export interface ContentEnabledForState {
 	player: boolean
 	locked: boolean
 	disabledSides?: ContentSide[]
-	disabledTooltip?: string | null
 	warningTooltip?: string | null
 }
 
diff --git a/packages/ui/src/layouts/wrapped/hosting/manage/content.vue b/packages/ui/src/layouts/wrapped/hosting/manage/content.vue
index c0fbeb205e..4fb243417e 100644
--- a/packages/ui/src/layouts/wrapped/hosting/manage/content.vue
+++ b/packages/ui/src/layouts/wrapped/hosting/manage/content.vue
@@ -104,14 +104,10 @@ const messages = defineMessages({
 		id: 'hosting.content.failed-to-install',
 		defaultMessage: 'Failed to install content',
 	},
-	sideLocked: {
-		id: 'hosting.content.enabled-for.side-locked',
-		defaultMessage: 'This option conflicts with the detected environment.',
-	},
 	unknownEnvironment: {
 		id: 'hosting.content.enabled-for.unknown-environment',
 		defaultMessage:
-			'We could not determine where this content should run. Check that the selected environments are correct.',
+			"We couldn't tell where this content should be enabled. Review the Server and Player choices.",
 	},
 	lockEnvironment: {
 		id: 'hosting.content.enabled-for.lock-environment',
@@ -331,21 +327,31 @@ function hasDetectedEnvironment(addon: Archon.Content.v1.Addon) {
 	return environment !== undefined && environment !== 'unknown'
 }
 
-function getLockedSides(addon: Archon.Content.v1.Addon): ContentSide[] {
-	if (addon.side_toggle_unlocked || !hasDetectedEnvironment(addon)) return []
-
+function getEnvironmentLockedSides(addon: Archon.Content.v1.Addon): ContentSide[] {
 	switch (getAddonEnvironment(addon)) {
+		case 'client_and_server':
 		case 'client_only':
 		case 'singleplayer_only':
-			return ['server']
 		case 'server_only':
 		case 'dedicated_server_only':
+			return ['server', 'player']
+		case 'client_only_server_optional':
 			return ['player']
+		case 'server_only_client_optional':
+			return ['server']
 		default:
 			return []
 	}
 }
 
+function getLockedSides(addon: Archon.Content.v1.Addon): ContentSide[] {
+	return addon.side_toggle_unlocked ? [] : getEnvironmentLockedSides(addon)
+}
+
+function hasEnvironmentLock(addon: Archon.Content.v1.Addon) {
+	return getEnvironmentLockedSides(addon).length > 0
+}
+
 function getEnabledForWarning(addon: Archon.Content.v1.Addon) {
 	if (addon.pack_client_retained) return formatMessage(commonMessages.clientRetainedWarning)
 	if (addon.pack_client_depends) return formatMessage(commonMessages.clientDependsWarning)
@@ -618,24 +624,26 @@ const deleteMutation = useMutation({
 
 type SetEnabledForVariables = {
 	addon: Archon.Content.v1.Addon
-	side: ContentSide
+	sides: ContentSide[]
 	enabled: boolean
 }
 
 const setEnabledForMutation = useMutation({
-	mutationFn: async ({ addon, side, enabled }: SetEnabledForVariables) => {
+	mutationFn: async ({ addon, sides, enabled }: SetEnabledForVariables) => {
 		const request: Archon.Content.v1.SetAddonEnabledRequest = {
 			filename: addon.filename,
 			kind: addon.kind,
 			enabled,
 		}
-		if (side === 'server') {
-			await client.archon.content_v1.setAddonEnabledServer(serverId, worldId.value!, request)
-		} else {
-			await client.archon.content_v1.setAddonEnabledPlayer(serverId, worldId.value!, request)
-		}
+		await Promise.all(
+			sides.map((side) =>
+				side === 'server'
+					? client.archon.content_v1.setAddonEnabledServer(serverId, worldId.value!, request)
+					: client.archon.content_v1.setAddonEnabledPlayer(serverId, worldId.value!, request),
+			),
+		)
 	},
-	onMutate: async ({ addon, side, enabled }) => {
+	onMutate: async ({ addon, sides, enabled }) => {
 		const targetQueryKey = getAddonQueryKey(addon)
 		await queryClient.cancelQueries({ queryKey: targetQueryKey })
 		const previousData = queryClient.getQueryData<Archon.Content.v1.Addons>(targetQueryKey)
@@ -645,9 +653,11 @@ const setEnabledForMutation = useMutation({
 				...oldData,
 				addons: (oldData.addons ?? []).map((candidate) => {
 					if (candidate.filename !== addon.filename || candidate.kind !== addon.kind) return candidate
-					return side === 'server'
-						? { ...candidate, disabled_server: !enabled }
-						: { ...candidate, disabled_player: !enabled }
+					return {
+						...candidate,
+						...(sides.includes('server') ? { disabled_server: !enabled } : {}),
+						...(sides.includes('player') ? { disabled_player: !enabled } : {}),
+					}
 				}),
 			}
 		})
@@ -718,7 +728,19 @@ async function handleSetEnabledFor(item: ContentItem, side: ContentSide, enabled
 	if (contentActionDisabled.value) return
 	const addon = getAddonForItem(item)
 	if (!addon) return
-	await setEnabledForMutation.mutateAsync({ addon, side, enabled })
+	await setEnabledForMutation.mutateAsync({ addon, sides: [side], enabled })
+}
+
+async function handleToggleEnabled(item: ContentItem) {
+	if (contentActionDisabled.value || !item.enabledFor) return
+	if (item.enabledFor.server !== item.enabledFor.player) return
+	const addon = getAddonForItem(item)
+	if (!addon) return
+	await setEnabledForMutation.mutateAsync({
+		addon,
+		sides: ['server', 'player'],
+		enabled: !item.enabledFor.server,
+	})
 }
 
 async function handleModpackSetEnabledFor(
@@ -726,13 +748,18 @@ async function handleModpackSetEnabledFor(
 	side: ContentSide,
 	enabled: boolean,
 ) {
-	modpackContentModal.value?.updateItem(item.file_name, { disabled: true })
 	try {
 		await handleSetEnabledFor(item, side, enabled)
 	} catch {
 		return
-	} finally {
-		modpackContentModal.value?.updateItem(item.file_name, { disabled: false })
+	}
+}
+
+async function handleModpackToggleEnabled(item: ContentItem) {
+	try {
+		await handleToggleEnabled(item)
+	} catch {
+		return
 	}
 }
 
@@ -946,6 +973,7 @@ function addonToContentItem(addon: AddonWithUiState): ContentItem {
 			: undefined
 	const serverEnabled = !addon.disabled_server
 	const playerEnabled = !addon.disabled_player
+	const lockedSides = getLockedSides(addon)
 	return {
 		project: {
 			...(projectMetadata ?? {}),
@@ -976,9 +1004,8 @@ function addonToContentItem(addon: AddonWithUiState): ContentItem {
 		enabledFor: {
 			server: serverEnabled,
 			player: playerEnabled,
-			locked: hasDetectedEnvironment(addon) && !addon.side_toggle_unlocked,
-			disabledSides: getLockedSides(addon),
-			disabledTooltip: formatMessage(messages.sideLocked),
+			locked: lockedSides.length > 0,
+			disabledSides: lockedSides,
 			warningTooltip: getEnabledForWarning(addon),
 		},
 		embeddedIcon,
@@ -1265,7 +1292,7 @@ function getOverflowOptions(item: ContentItem): OverflowMenuOption[] {
 		})
 	}
 
-	if (addon && hasDetectedEnvironment(addon)) {
+	if (addon && hasEnvironmentLock(addon)) {
 		if (options.length > 0) options.push({ type: 'divider' })
 		options.push({
 			id: 'toggle-side-lock',
@@ -1291,7 +1318,10 @@ provideContentManager({
 	disableAddContent: computed(() => !canSetup.value),
 	disableAddContentTooltip: permissionDeniedMessage.value,
 	contentTypeLabel: type,
+	toggleEnabled: handleToggleEnabled,
 	setEnabledFor: handleSetEnabledFor,
+	canToggleItem: (item) =>
+		item.enabledFor !== undefined && item.enabledFor.server === item.enabledFor.player,
 	deleteItem: handleDeleteItem,
 	bulkDeleteItems: handleBulkDelete,
 	refresh: async () => {
@@ -1332,7 +1362,6 @@ provideContentManager({
 			enabled: item.enabled,
 			enabledFor: item.enabledFor,
 			embeddedIcon: item.embeddedIcon,
-			hideToggle: true,
 		}
 	},
 	filterPersistKey: `server:${serverId}:${worldId.value}`,
@@ -1367,6 +1396,7 @@ provideContentManager({
 					:get-overflow-options="getOverflowOptions"
 					:action-disabled="contentActionDisabled"
 					:action-disabled-tooltip="contentActionBusyMessage ?? undefined"
+					@update:enabled="handleModpackToggleEnabled"
 					@update:enabled-for="handleModpackSetEnabledFor"
 					@hide="isModpackContentModalOpen = false"
 				/>
diff --git a/packages/ui/src/stories/base/Toggle.stories.ts b/packages/ui/src/stories/base/Toggle.stories.ts
index 9ab7590adf..bd5ecf58c9 100644
--- a/packages/ui/src/stories/base/Toggle.stories.ts
+++ b/packages/ui/src/stories/base/Toggle.stories.ts
@@ -8,7 +8,8 @@ const meta = {
 	parameters: {
 		docs: {
 			description: {
-				component: 'Toggle uses touch manipulation so double tapping on mobile does not zoom.',
+				component:
+					'Toggle uses touch manipulation so double tapping on mobile does not zoom. Set indeterminate to show a line between its on and off states.',
 			},
 		},
 	},
@@ -30,6 +31,13 @@ export const Checked: Story = {
 	},
 }
 
+export const Indeterminate: Story = {
+	args: {
+		modelValue: false,
+		indeterminate: true,
+	},
+}
+
 export const Disabled: Story = {
 	args: {
 		modelValue: false,
@@ -63,6 +71,9 @@ export const AllStates: Story = {
 				<div style="display: flex; align-items: center; gap: 0.5rem;">
 					<Toggle :model-value="true" /> On
 				</div>
+				<div style="display: flex; align-items: center; gap: 0.5rem;">
+					<Toggle :model-value="false" :indeterminate="true" /> Indeterminate
+				</div>
 				<div style="display: flex; align-items: center; gap: 0.5rem;">
 					<Toggle :model-value="false" :disabled="true" /> Disabled
 				</div>
@@ -73,6 +84,9 @@ export const AllStates: Story = {
 				<div style="display: flex; align-items: center; gap: 0.5rem;">
 					<Toggle :model-value="true" :small="true" /> On
 				</div>
+				<div style="display: flex; align-items: center; gap: 0.5rem;">
+					<Toggle :model-value="false" :indeterminate="true" :small="true" /> Indeterminate
+				</div>
 				<div style="display: flex; align-items: center; gap: 0.5rem;">
 					<Toggle :model-value="false" :small="true" :disabled="true" /> Disabled
 				</div>