diff --git a/frontend/src/lib/components/DropdownV2Inner.svelte b/frontend/src/lib/components/DropdownV2Inner.svelte
index 5f8b96c32f..7749310b5b 100644
--- a/frontend/src/lib/components/DropdownV2Inner.svelte
+++ b/frontend/src/lib/components/DropdownV2Inner.svelte
@@ -53,12 +53,17 @@
 		{#if item.icon}
 			<item.icon size={14} color={item.iconColor} class="shrink-0" {...item.iconProps ?? {}} />
 		{/if}
-		<p
-			title={item.disabled && item.tooltip ? undefined : item.displayName}
-			class="truncate grow min-w-0 whitespace-nowrap text-left"
-		>
-			{item.displayName}
-		</p>
+		<div class="grow min-w-0 text-left">
+			<p
+				title={item.disabled && item.tooltip ? undefined : item.displayName}
+				class="truncate whitespace-nowrap"
+			>
+				{item.displayName}
+			</p>
+			{#if item.description}
+				<p class="text-2xs text-secondary">{item.description}</p>
+			{/if}
+		</div>
 		{@render item.extra?.()}
 		{#if item.shortcut || item.selected || item.toggle !== undefined}
 			<!-- Single trailing group so `shortcut` and `selected` can coexist:
diff --git a/frontend/src/lib/components/common/button/Button.svelte b/frontend/src/lib/components/common/button/Button.svelte
index 2081e12e29..7233cb197c 100644
--- a/frontend/src/lib/components/common/button/Button.svelte
+++ b/frontend/src/lib/components/common/button/Button.svelte
@@ -16,6 +16,7 @@
 
 	type MenuItem = {
 		label: string
+		description?: string
 		onClick?: (e?: Event) => void
 		href?: string
 		icon?: any
@@ -146,6 +147,7 @@
 		const items = typeof menuItems === 'function' ? menuItems() : menuItems
 		return items.map((item) => ({
 			displayName: item.label,
+			description: item.description,
 			action: item.onClick ? (e) => item.onClick?.(e) : undefined,
 			icon: item.icon,
 			disabled: item.disabled ?? false,
diff --git a/frontend/src/lib/components/details/DetailPageHeader.svelte b/frontend/src/lib/components/details/DetailPageHeader.svelte
index d38c4cb6fe..77c802dcd2 100644
--- a/frontend/src/lib/components/details/DetailPageHeader.svelte
+++ b/frontend/src/lib/components/details/DetailPageHeader.svelte
@@ -6,14 +6,23 @@
 	import { twMerge } from 'tailwind-merge'
 	import { userStore } from '$lib/stores'
 	import { createEventDispatcher, getContext, tick } from 'svelte'
+	import { MediaQuery } from 'svelte/reactivity'
 	import SummaryPathDisplay from '$lib/components/SummaryPathDisplay.svelte'
 	import type { TriggerContext } from '../triggers'
-	import { Calendar } from 'lucide-svelte'
+	import type { Item } from '$lib/utils'
+	import { Bell, BellOff, Calendar } from 'lucide-svelte'
+	import { toggleWorkspaceErrorHandler } from './errorHandlerToggle'
 
 	type MainButton = {
 		label: string
-		href: string
+		/** Shown under the label once the button has collapsed into a menu. */
+		description?: string
 		buttonProps: ButtonProps
+		/** Where the button lands below the `lg` breakpoint, where the bar cannot hold every
+		 * button beside the summary: the ellipsis menu, or the dropdown of the enabled bar button
+		 * labelled `dropdownOf` (the menu when there is none). Unset keeps it in the bar at every
+		 * width. */
+		narrow?: 'menu' | { dropdownOf: string }
 	}
 
 	type ButtonProps = any
@@ -59,6 +68,70 @@
 	}: Props = $props()
 
 	const dispatch = createEventDispatcher()
+
+	// Tailwind's `lg`, matched in JS so the one ellipsis menu can carry the collapsed buttons.
+	const wide = new MediaQuery('(min-width: 1024px)')
+
+	const barButtons = $derived(wide.current ? mainButtons : mainButtons.filter((b) => !b.narrow))
+
+	function dropdownHost(btn: MainButton): MainButton | undefined {
+		if (typeof btn.narrow !== 'object') return undefined
+		const label = btn.narrow.dropdownOf
+		return barButtons.find((b) => b.label === label && !b.buttonProps.disabled)
+	}
+
+	async function toggleErrorHandler() {
+		const next = await toggleWorkspaceErrorHandler(
+			errorHandlerKind,
+			scriptOrFlowPath,
+			errorHandlerMuted
+		)
+		if (next !== undefined) errorHandlerMuted = next
+	}
+
+	const allMenuItems: Item[] = $derived([
+		...(wide.current ? [] : mainButtons.filter((b) => b.narrow && !dropdownHost(b))).map((b) => ({
+			displayName: b.label,
+			description: b.description,
+			icon: b.buttonProps.startIcon,
+			href: b.buttonProps.href,
+			action: b.buttonProps.onClick,
+			disabled: b.buttonProps.disabled,
+			type: 'action' as const
+		})),
+		...(wide.current
+			? []
+			: [
+					{
+						displayName: errorHandlerMuted ? 'Unmute error handler' : 'Mute error handler',
+						icon: errorHandlerMuted ? BellOff : Bell,
+						action: toggleErrorHandler,
+						type: 'action' as const
+					}
+				]),
+		...menuItems.map((item, i) => ({
+			displayName: item.label,
+			icon: item.Icon,
+			action: item.onclick,
+			type: item.color === 'red' ? ('delete' as const) : ('action' as const),
+			separatorTop: i === 0 && !wide.current
+		}))
+	])
+
+	function dropdownItemsOf(host: MainButton) {
+		if (wide.current) return undefined
+		const items = mainButtons
+			.filter((b) => dropdownHost(b) === host)
+			.map((b) => ({
+				label: b.label,
+				description: b.description,
+				icon: b.buttonProps.startIcon,
+				href: b.buttonProps.href,
+				onClick: b.buttonProps.onClick,
+				disabled: b.buttonProps.disabled
+			}))
+		return items.length > 0 ? items : undefined
+	}
 </script>
 
 <div class="border-b">
@@ -103,38 +176,26 @@
 				{@render trigger_badges?.()}
 			</div>
 			<div class="flex gap-1 items-center pr-4">
-				{#if menuItems.length > 0}
-					{#key menuItems}
-						<DropdownV2
-							items={menuItems.map((item) => ({
-								displayName: item.label,
-								icon: item.Icon,
-								action: item.onclick,
-								type: item.color === 'red' ? 'delete' : 'action'
-							}))}
-							placement="bottom-end"
-							size="md"
-						/>
+				{#if allMenuItems.length > 0}
+					{#key allMenuItems}
+						<DropdownV2 items={allMenuItems} placement="bottom-end" size="md" />
 					{/key}
 				{/if}
-				<ErrorHandlerToggleButton
-					kind={errorHandlerKind}
-					{scriptOrFlowPath}
-					bind:errorHandlerMuted
-				/>
-				{#each mainButtons as btn}
+				{#if wide.current}
+					<ErrorHandlerToggleButton
+						kind={errorHandlerKind}
+						{scriptOrFlowPath}
+						bind:errorHandlerMuted
+					/>
+				{/if}
+				{#each barButtons as btn (btn.label)}
+					{@const dropdownItems = dropdownItemsOf(btn)}
 					<Button
 						{...btn.buttonProps}
 						startIcon={{ icon: btn.buttonProps.startIcon }}
-						btnClasses="hidden md:flex items-center gap-1 whitespace-nowrap"
-					>
-						{btn.label}
-					</Button>
-					<Button
-						{...btn.buttonProps}
-						startIcon={{ icon: btn.buttonProps.startIcon }}
-						iconOnly
-						btnClasses="flex md:hidden items-center gap-1 whitespace-nowrap"
+						{dropdownItems}
+						dropdownWidth={dropdownItems?.some((i) => i.description) ? 288 : undefined}
+						btnClasses="flex items-center gap-1 whitespace-nowrap"
 					>
 						{btn.label}
 					</Button>
diff --git a/frontend/src/lib/components/details/ErrorHandlerToggleButton.svelte b/frontend/src/lib/components/details/ErrorHandlerToggleButton.svelte
index 9c0b964c9f..6097a235ca 100644
--- a/frontend/src/lib/components/details/ErrorHandlerToggleButton.svelte
+++ b/frontend/src/lib/components/details/ErrorHandlerToggleButton.svelte
@@ -2,58 +2,21 @@
 	import { Bell, BellOff } from 'lucide-svelte'
 
 	import { Button } from '$lib/components/common'
-	import { FlowService, ScriptService } from '$lib/gen'
-	import { sendUserToast } from '$lib/toast'
-	import { workspaceStore } from '$lib/stores'
 	import Tooltip from '../Tooltip.svelte'
+	import { toggleWorkspaceErrorHandler } from './errorHandlerToggle'
 
 	interface Props {
-		kind: 'script' | 'flow';
-		scriptOrFlowPath: string;
-		errorHandlerMuted: boolean | undefined;
-		iconOnly?: boolean;
+		kind: 'script' | 'flow'
+		scriptOrFlowPath: string
+		errorHandlerMuted: boolean | undefined
+		iconOnly?: boolean
 	}
 
-	let {
-		kind,
-		scriptOrFlowPath,
-		errorHandlerMuted = $bindable(),
-		iconOnly = true
-	}: Props = $props();
+	let { kind, scriptOrFlowPath, errorHandlerMuted = $bindable(), iconOnly = true }: Props = $props()
 
 	async function toggleErrorHandler(): Promise<void> {
-		if ($workspaceStore !== undefined) {
-			try {
-				if (kind === 'flow') {
-					await FlowService.toggleWorkspaceErrorHandlerForFlow({
-						workspace: $workspaceStore,
-						path: scriptOrFlowPath,
-						requestBody: {
-							muted: !errorHandlerMuted
-						}
-					})
-				} else {
-					await ScriptService.toggleWorkspaceErrorHandlerForScript({
-						workspace: $workspaceStore,
-						path: scriptOrFlowPath,
-						requestBody: {
-							muted: !errorHandlerMuted
-						}
-					})
-				}
-			} catch (error) {
-				sendUserToast(
-					`Error while toggling Workspace Error Handler: ${error.body || error.message}`,
-					true
-				)
-				return
-			}
-			errorHandlerMuted = !errorHandlerMuted
-			sendUserToast(
-				errorHandlerMuted ? 'Workspace error handler muted' : 'Workspace error handler active',
-				false
-			)
-		}
+		const next = await toggleWorkspaceErrorHandler(kind, scriptOrFlowPath, errorHandlerMuted)
+		if (next !== undefined) errorHandlerMuted = next
 	}
 </script>
 
diff --git a/frontend/src/lib/components/details/errorHandlerToggle.ts b/frontend/src/lib/components/details/errorHandlerToggle.ts
new file mode 100644
index 0000000000..1a7ab5296a
--- /dev/null
+++ b/frontend/src/lib/components/details/errorHandlerToggle.ts
@@ -0,0 +1,39 @@
+import { get } from 'svelte/store'
+import { FlowService, ScriptService } from '$lib/gen'
+import { sendUserToast } from '$lib/toast'
+import { workspaceStore } from '$lib/stores'
+
+/** Flips the workspace error handler for one script or flow and reports the outcome in a
+ * toast. Returns the new muted state, or undefined when nothing changed. */
+export async function toggleWorkspaceErrorHandler(
+	kind: 'script' | 'flow',
+	path: string,
+	muted: boolean | undefined
+): Promise<boolean | undefined> {
+	const workspace = get(workspaceStore)
+	if (workspace === undefined) return undefined
+	const next = !muted
+	try {
+		if (kind === 'flow') {
+			await FlowService.toggleWorkspaceErrorHandlerForFlow({
+				workspace,
+				path,
+				requestBody: { muted: next }
+			})
+		} else {
+			await ScriptService.toggleWorkspaceErrorHandlerForScript({
+				workspace,
+				path,
+				requestBody: { muted: next }
+			})
+		}
+	} catch (error) {
+		sendUserToast(
+			`Error while toggling Workspace Error Handler: ${error.body || error.message}`,
+			true
+		)
+		return undefined
+	}
+	sendUserToast(next ? 'Workspace error handler muted' : 'Workspace error handler active', false)
+	return next
+}
diff --git a/frontend/src/lib/utils.ts b/frontend/src/lib/utils.ts
index 635fc6f14e..512e5643a6 100644
--- a/frontend/src/lib/utils.ts
+++ b/frontend/src/lib/utils.ts
@@ -1669,6 +1669,8 @@ export function conditionalMelt(node: HTMLElement, meltItem: AnyMeltElement | un
 
 export type Item = {
 	displayName: string
+	/** Second line under the label, for an action whose name alone does not say what it does. */
+	description?: string
 	action?: (e: MouseEvent) => void
 	icon?: any
 	iconColor?: string
diff --git a/frontend/src/lib/utils/editInFork.ts b/frontend/src/lib/utils/editInFork.ts
index 4e0344471f..db94d9ad11 100644
--- a/frontend/src/lib/utils/editInFork.ts
+++ b/frontend/src/lib/utils/editInFork.ts
@@ -43,6 +43,19 @@ export function editInForkLabel(
 	return dev ? `Edit in ${dev.name}` : 'Edit in fork'
 }
 
+/** One line under `editInForkLabel` for a menu entry, saying where the edit happens. */
+export function editInForkDescription(
+	itemType: ItemType,
+	currentWorkspaceId: string | undefined,
+	allWorkspaces: UserWorkspace[]
+): string {
+	const kind = itemType === 'raw_app' ? 'app' : itemType
+	const dev = findCanonicalDevWorkspace(currentWorkspaceId, allWorkspaces)
+	return dev
+		? `Open this ${kind} in the ${dev.name} dev workspace`
+		: `Edit this ${kind} in a forked workspace, then deploy the changes back`
+}
+
 /**
  * Whether the user may CREATE a new fork of the current workspace: forking not disabled, or the user
  * can bypass the rule (workspace admins). Keeps the "Fork workspace" entry available to admins as the
diff --git a/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte b/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
index 6a6e731c11..59ed08c8b8 100644
--- a/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
+++ b/frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte
@@ -80,6 +80,7 @@
 	import {
 		buildForkEditUrl,
 		editInForkAllowed,
+		editInForkDescription,
 		editInForkLabel,
 		onEditInForkClick
 	} from '$lib/utils/editInFork'
@@ -301,6 +302,8 @@
 		if (flow && !$userStore?.operator) {
 			buttons.push({
 				label: 'Fork',
+				description: `Start a new flow from a copy of this one`,
+				narrow: { dropdownOf: 'Edit' },
 				buttonProps: {
 					href: `${base}/flows/add?template=${flow.path}`,
 					variant: 'subtle',
@@ -319,6 +322,8 @@
 		) {
 			buttons.push({
 				label: editInForkLabel($workspaceStore, $userWorkspaces),
+				description: editInForkDescription('flow', $workspaceStore, $userWorkspaces),
+				narrow: { dropdownOf: 'Edit' },
 				buttonProps: {
 					href: buildForkEditUrl('flow', flow.path),
 					onClick: (e: Event | undefined) =>
@@ -346,6 +351,7 @@
 
 		buttons.push({
 			label: `History`,
+			narrow: 'menu',
 			buttonProps: {
 				onClick: () => flowHistory?.open(),
 				unifiedSize: 'md',
@@ -361,6 +367,7 @@
 		if (!$userStore?.operator) {
 			buttons.push({
 				label: 'Build app',
+				narrow: 'menu',
 				buttonProps: {
 					onClick: async () => {
 						const app = createRawAppFromFlow(flow.path, flow.summary, flow.schema)
diff --git a/frontend/src/routes/(root)/(logged)/scripts/get/[...hash]/+page.svelte b/frontend/src/routes/(root)/(logged)/scripts/get/[...hash]/+page.svelte
index a856c9d0ac..28b1b55426 100644
--- a/frontend/src/routes/(root)/(logged)/scripts/get/[...hash]/+page.svelte
+++ b/frontend/src/routes/(root)/(logged)/scripts/get/[...hash]/+page.svelte
@@ -103,6 +103,7 @@
 	import {
 		buildForkEditUrl,
 		editInForkAllowed,
+		editInForkDescription,
 		editInForkLabel,
 		onEditInForkClick
 	} from '$lib/utils/editInFork'
@@ -459,6 +460,8 @@
 		if (!topHash && script && !$userStore?.operator && !script.codebase) {
 			buttons.push({
 				label: 'Fork',
+				description: `Start a new script from a copy of this one`,
+				narrow: { dropdownOf: 'Edit' },
 				buttonProps: {
 					href: `${base}/scripts/add?template=${script.path}`,
 					unifiedSize: 'md',
@@ -477,6 +480,8 @@
 		) {
 			buttons.push({
 				label: editInForkLabel($workspaceStore, $userWorkspaces),
+				description: editInForkDescription('script', $workspaceStore, $userWorkspaces),
+				narrow: { dropdownOf: 'Edit' },
 				buttonProps: {
 					href: buildForkEditUrl('script', script.path),
 					onClick: (e: Event | undefined) =>
@@ -509,6 +514,7 @@
 		if (Array.isArray(script.parent_hashes) && script.parent_hashes.length > 0) {
 			buttons.push({
 				label: `History`,
+				narrow: 'menu',
 				buttonProps: {
 					onClick: () => {
 						versionsDrawerOpen = !versionsDrawerOpen
@@ -524,6 +530,7 @@
 		if (!$userStore?.operator) {
 			buttons.push({
 				label: 'Build app',
+				narrow: 'menu',
 				buttonProps: {
 					onClick: async () => {
 						const app = createRawAppFromScript(script.path, script.summary, script.schema)