diff --git a/lama_cleaner/app/src/components/Editor/Editor.tsx b/lama_cleaner/app/src/components/Editor/Editor.tsx
index 8e6fb00..dd81833 100644
--- a/lama_cleaner/app/src/components/Editor/Editor.tsx
+++ b/lama_cleaner/app/src/components/Editor/Editor.tsx
@@ -62,6 +62,8 @@ import emitter, {
   EVENT_CUSTOM_MASK,
   EVENT_PAINT_BY_EXAMPLE,
   RERUN_LAST_MASK,
+  DREAM_BUTTON_MOUSE_ENTER,
+  DREAM_BUTTON_MOUSE_LEAVE,
 } from '../../event'
 import FileSelect from '../FileSelect/FileSelect'
 import InteractiveSeg from '../InteractiveSeg/InteractiveSeg'
@@ -130,15 +132,24 @@ export default function Editor() {
   )
 
   const [showInteractiveSegModal, setShowInteractiveSegModal] = useState(false)
-  const [interactiveSegMask, setInteractiveSegMask] =
-    useState<HTMLImageElement | null>(null)
+  const [interactiveSegMask, setInteractiveSegMask] = useState<
+    HTMLImageElement | null | undefined
+  >(null)
   // only used while interactive segmentation is on
-  const [tmpInteractiveSegMask, setTmpInteractiveSegMask] =
-    useState<HTMLImageElement | null>(null)
+  const [tmpInteractiveSegMask, setTmpInteractiveSegMask] = useState<
+    HTMLImageElement | null | undefined
+  >(null)
   const [prevInteractiveSegMask, setPrevInteractiveSegMask] = useState<
     HTMLImageElement | null | undefined
   >(null)
 
+  // 仅用于在 dream button hover 时显示提示
+  const [dreamButtonHoverSegMask, setDreamButtonHoverSegMask] = useState<
+    HTMLImageElement | null | undefined
+  >(null)
+  const [dreamButtonHoverLineGroup, setDreamButtonHoverLineGroup] =
+    useState<LineGroup>([])
+
   const [clicks, setClicks] = useRecoilState(interactiveSegClicksState)
 
   const [brushSize, setBrushSize] = useRecoilState(brushSizeState)
@@ -202,21 +213,33 @@ export default function Editor() {
 
       context.clearRect(0, 0, context.canvas.width, context.canvas.height)
       context.drawImage(render, 0, 0, imageWidth, imageHeight)
-      if (isInteractiveSeg && tmpInteractiveSegMask !== null) {
+      if (isInteractiveSeg && tmpInteractiveSegMask) {
         context.drawImage(tmpInteractiveSegMask, 0, 0, imageWidth, imageHeight)
       }
-      if (!isInteractiveSeg && interactiveSegMask !== null) {
+      if (!isInteractiveSeg && interactiveSegMask) {
         context.drawImage(interactiveSegMask, 0, 0, imageWidth, imageHeight)
       }
+      if (dreamButtonHoverSegMask) {
+        context.drawImage(
+          dreamButtonHoverSegMask,
+          0,
+          0,
+          imageWidth,
+          imageHeight
+        )
+      }
       drawLines(context, lineGroup)
+      drawLines(context, dreamButtonHoverLineGroup)
     },
     [
       context,
       isInteractiveSeg,
       tmpInteractiveSegMask,
+      dreamButtonHoverSegMask,
       interactiveSegMask,
       imageHeight,
       imageWidth,
+      dreamButtonHoverLineGroup,
     ]
   )
 
@@ -277,6 +300,7 @@ export default function Editor() {
 
   const drawOnCurrentRender = useCallback(
     (lineGroup: LineGroup) => {
+      console.log('[drawOnCurrentRender] draw on current render')
       if (renders.length === 0) {
         draw(original, lineGroup)
       } else {
@@ -459,6 +483,53 @@ export default function Editor() {
     prevInteractiveSegMask,
   ])
 
+  useEffect(() => {
+    emitter.on(DREAM_BUTTON_MOUSE_ENTER, () => {
+      // 当前 canvas 上没有手绘 mask 或者 interactiveSegMask 时，显示上一次的 mask
+      if (!hadDrawSomething() && !interactiveSegMask) {
+        if (prevInteractiveSegMask) {
+          setDreamButtonHoverSegMask(prevInteractiveSegMask)
+        }
+        let lineGroup2Show: LineGroup = []
+        if (redoLineGroups.length !== 0) {
+          lineGroup2Show = redoLineGroups[redoLineGroups.length - 1]
+        } else if (lineGroups.length !== 0) {
+          lineGroup2Show = lineGroups[lineGroups.length - 1]
+        }
+        console.log(
+          `[DREAM_BUTTON_MOUSE_ENTER], prevInteractiveSegMask: ${prevInteractiveSegMask} lineGroup2Show: ${lineGroup2Show.length}`
+        )
+        if (lineGroup2Show) {
+          setDreamButtonHoverLineGroup(lineGroup2Show)
+        }
+      }
+    })
+    return () => {
+      emitter.off(DREAM_BUTTON_MOUSE_ENTER)
+    }
+  }, [
+    hadDrawSomething,
+    interactiveSegMask,
+    prevInteractiveSegMask,
+    drawOnCurrentRender,
+    lineGroups,
+    redoLineGroups,
+  ])
+
+  useEffect(() => {
+    emitter.on(DREAM_BUTTON_MOUSE_LEAVE, () => {
+      // 当前 canvas 上没有手绘 mask 或者 interactiveSegMask 时，显示上一次的 mask
+      if (!hadDrawSomething() && !interactiveSegMask) {
+        setDreamButtonHoverSegMask(null)
+        setDreamButtonHoverLineGroup([])
+        drawOnCurrentRender([])
+      }
+    })
+    return () => {
+      emitter.off(DREAM_BUTTON_MOUSE_LEAVE)
+    }
+  }, [hadDrawSomething, interactiveSegMask, drawOnCurrentRender])
+
   useEffect(() => {
     emitter.on(EVENT_CUSTOM_MASK, (data: any) => {
       // TODO: not work with paint by example
@@ -743,7 +814,7 @@ export default function Editor() {
       setInitialCentered(true)
     }
   }, [
-    context?.canvas,
+    // context?.canvas,
     viewportRef,
     original,
     isOriginalLoaded,
diff --git a/lama_cleaner/app/src/components/Header/PromptInput.tsx b/lama_cleaner/app/src/components/Header/PromptInput.tsx
index 21022e2..0bd2b17 100644
--- a/lama_cleaner/app/src/components/Header/PromptInput.tsx
+++ b/lama_cleaner/app/src/components/Header/PromptInput.tsx
@@ -1,14 +1,18 @@
 import React, { FormEvent, useRef, useState } from 'react'
 import { useClickAway } from 'react-use'
 import { useRecoilState, useRecoilValue } from 'recoil'
-import emitter, { EVENT_PROMPT } from '../../event'
+import emitter, {
+  DREAM_BUTTON_MOUSE_ENTER,
+  DREAM_BUTTON_MOUSE_LEAVE,
+  EVENT_PROMPT,
+} from '../../event'
 import { appState, isInpaintingState, propmtState } from '../../store/Atoms'
 import Button from '../shared/Button'
 import TextInput from '../shared/Input'
 
 // TODO: show progress in input
 const PromptInput = () => {
-  const [app, setAppState] = useRecoilState(appState)
+  const app = useRecoilValue(appState)
   const [prompt, setPrompt] = useRecoilState(propmtState)
   const isInpainting = useRecoilValue(isInpaintingState)
   const ref = useRef(null)
@@ -39,6 +43,14 @@ const PromptInput = () => {
     }
   }
 
+  const onMouseEnter = () => {
+    emitter.emit(DREAM_BUTTON_MOUSE_ENTER)
+  }
+
+  const onMouseLeave = () => {
+    emitter.emit(DREAM_BUTTON_MOUSE_LEAVE)
+  }
+
   return (
     <div className="prompt-wrapper">
       <TextInput
@@ -52,6 +64,8 @@ const PromptInput = () => {
         border
         onClick={handleRepaintClick}
         disabled={prompt.length === 0 || app.isInpainting}
+        onMouseEnter={onMouseEnter}
+        onMouseLeave={onMouseLeave}
       >
         Dream
       </Button>
diff --git a/lama_cleaner/app/src/components/shared/Button.tsx b/lama_cleaner/app/src/components/shared/Button.tsx
index 8126bfa..a2fc170 100644
--- a/lama_cleaner/app/src/components/shared/Button.tsx
+++ b/lama_cleaner/app/src/components/shared/Button.tsx
@@ -12,6 +12,8 @@ interface ButtonProps {
   onClick?: () => void
   onDown?: (ev: PointerEvent) => void
   onUp?: (ev: PointerEvent) => void
+  onMouseEnter?: () => void
+  onMouseLeave?: () => void
   style?: React.CSSProperties
 }
 
@@ -27,6 +29,8 @@ const Button: React.FC<ButtonProps> = props => {
     onClick,
     onDown,
     onUp,
+    onMouseEnter,
+    onMouseLeave,
     style,
   } = props
 
@@ -42,6 +46,8 @@ const Button: React.FC<ButtonProps> = props => {
         style={style}
         onKeyDown={onKeyDown}
         onClick={blurOnClick}
+        onMouseEnter={onMouseEnter}
+        onMouseLeave={onMouseLeave}
         onPointerDown={(ev: React.PointerEvent<HTMLDivElement>) => {
           onDown?.(ev.nativeEvent)
         }}
diff --git a/lama_cleaner/app/src/event.ts b/lama_cleaner/app/src/event.ts
index ac75816..eab7840 100644
--- a/lama_cleaner/app/src/event.ts
+++ b/lama_cleaner/app/src/event.ts
@@ -14,6 +14,9 @@ export interface PaintByExampleEventData {
 
 export const RERUN_LAST_MASK = 'rerun_last_mask'
 
+export const DREAM_BUTTON_MOUSE_ENTER = 'dream_button_mouse_enter'
+export const DREAM_BUTTON_MOUSE_LEAVE = 'dream_btoon_mouse_leave'
+
 const emitter = mitt()
 
 export default emitter