Advanced Editing: Multi-Region Lasso Selection
Why It Matters
Editing AI images with text prompts is hit-or-miss. You ask to "change the background" and the AI changes the subject too. Advanced Editing solves this with precision—draw exactly where you want changes, describe what you want, done.
The bottom line: Lasso-select up to 4 different regions on any image and give each area its own editing instructions. All changes happen in one generation.
What You Can Do
The toolkit: Draw lasso selections around specific areas, add text instructions for each region, generate multi-region edits in seconds, and iterate further by opening Advanced Editing on the result.
Use cases:
Remove background without affecting the subject
Add texture to one element while changing colors on another
Replace specific objects while keeping everything else intact
Fine-tune multiple areas in a single edit
How to Use Advanced Editing
Opening Advanced Editing
Generate or select any image in chat
Click the image to show Quick Actions menu
Click Advanced Editing button
Modal opens with your image ready for editing
Drawing Lasso Selections
Start immediately—no tools to activate:
Click and drag on the image to draw a selection
Your lasso path appears as a dashed colored outline
Release to auto-complete the selection
Cursor automatically moves to the instruction field
Visual feedback while drawing:
First region = red outline
Second region = green outline
Third region = orange outline
Fourth region = blue outline
Subtle fill inside each selection (6% opacity)
Adding Instructions
After completing a lasso selection:
The instruction field auto-focuses
You'll see a placeholder: "[red marked area]"
Type what you want to happen in that area
Example: "remove background" or "add golden texture"
The instruction should describe the change, not the color. The color markers are just visual guides—the AI sees your lasso selection and instruction.
Adding More Regions
Up to 4 total regions per edit:
Click the + button in the sidebar
Next region created (green, then orange, then blue)
Draw your second selection
Add instructions for that area
Repeat for up to 4 regions
Maximum reached: Once you have 4 regions, the + button disappears and you'll see "Maximum 4 selections reached."
Generating the Edit
Complete at least one lasso selection with instructions
Click Generate Edit button (bottom of sidebar)
Modal closes immediately
Loading indicator appears in chat
Edited image replaces the original when ready
The workflow: Advanced Editing is just another way to edit—it works like other editing operations in Dezygn. Generate → close → load → result.
The Interface
Desktop Layout
Two-column design:
Left: Image canvas with modern dot pattern background
Right: Narrow sidebar (regions list and Generate button)
Clean and focused: No header clutter, just the image and your regions.
Mobile Layout
Stacked design:
Canvas on top
Regions sidebar below
Generate button fixed at bottom
Scrollable regions list
Sidebar Controls
When you start:
Banner: "Click and drag on the image to select an area you want to edit"
After creating regions:
Header showing "Regions" count
Each region card shows:
Color dot indicator
"[color] area" label
Instruction field
Delete icon (hover to see)
+ button to add regions (max 4)
Generate Edit button at bottom
How It Works Behind the Scenes
The Process
You draw lasso selections and add instructions
Dezygn creates a masked version of your image with colored outlines
All instructions combine into one prompt
The masked image + combined prompt go to AI
AI processes each region with its specific instruction
Result appears in chat
Example combined prompt: "In the red marked area: remove background. In the green marked area: add golden texture."
Why Lasso (Not Brush)?
Lasso selections draw outlines around areas. Brush/paint masks require painting over every pixel. Lasso is faster for most editing tasks—outline the area, done.
When brush would be better: Very complex shapes with intricate edges. We chose lasso for speed and simplicity in V1.
Pro Tips
Efficient Multi-Region Editing
Start with the most important change first (red region)
Use clear, specific instructions ("remove background" not "make it better")
Don't overlap regions—keeps instructions clean
Preview your lasso before releasing—if it's wrong, just redraw
Iterating on Edits
Generate your first edit
Review the result in chat
Click the result and open Advanced Editing again
Draw new regions to refine further
Repeat until perfect
No version history yet—each edit replaces the previous. Save versions you like by downloading them before further editing.
Mobile vs Desktop
Desktop: Full two-column layout, precise lasso control, easier to manage multiple regions.
Mobile: Works perfectly but stacked layout takes more scrolling. Best for 1-2 region edits on the go.
Frequently Asked Questions
Q: How many regions can I select? A: Maximum 4 regions per edit. This keeps the interface simple and AI processing reliable.
Q: Can I undo a lasso selection? A: Not yet. If you draw a bad selection, delete the region and create a new one.
Q: What happens if my selections overlap? A: The AI will process both instructions in the overlapping area. Results may be unpredictable—avoid overlaps when possible.
Q: Can I use Advanced Editing on images I uploaded? A: Yes! Upload an image to chat, then use Quick Actions → Advanced Editing.
Q: Does this cost credits? A: Yes, Advanced Editing uses credits like other editing operations. Each generation consumes credits based on your plan.
Q: Can I save my lasso regions for later? A: Not currently. Each editing session starts fresh. This is a potential future enhancement.
Q: Why does the modal close before I see results? A: Advanced Editing follows Dezygn's standard editing flow—generate, close, load, show result. This keeps the experience consistent with other editing operations.
Related Features
Quick Actions - Access all editing tools from any image
Pro Mode - Professional workflow controls
AI Image Generation - Create images from text
Desktop and mobile users: Click any generated image and select Advanced Editing from Quick Actions to get started.