This is typically caused by one of three active editor locks:

• Active Selection Lock: If a selection is active, you can only paint inside that selection. Press Escape or click Clear Selection to paint elsewhere.
• Import Overlay Lock: While dragging, cropping, or scaling an imported image, all drawing tools are paused. Click Commit (check) or Cancel (close) to unlock the canvas.
• Rotation Preview Lock: When using custom layer rotation angles, drawing is disabled while the preview is displayed. Click Apply or Cancel in the Transform panel.
• Locked Layer: Verify that the active layer card in your floating Layers stack does not display the lock icon (lock). Click the lock to toggle edit mode.

The Fill tool fills connected pixels of a matching color. If a selection mask is active, the fill area is tightly constrained inside that boundary. Clear the selection if you want to flood the full canvas.

Shortcuts are temporarily disabled whenever focus is shifted away from the workspace (for example, if you click the browser's search bar, switch tabs, or are currently typing inside text fields like Cursor Name, Frame Delay, or Custom Sizing inputs). Click anywhere on the drawing canvas to return keyboard focus back to the editor.

Because typical cursors have small pixel grids (e.g. 32x32 px), high-res images undergo massive downsampling. Use the Fit to Canvas or Real Size (100%) buttons in the import bar. Ensure you select the Crisp (Nearest-Neighbor) resize method for retro pixel art, and Smooth (Lanczos) for photos and detailed vectors.

Autosaves are stored locally inside your browser's private sandbox (IndexedDB). They do not sync to servers. Your draft will disappear if you switch browsers, use Private/Incognito windows, run cleaning tools (like CCleaner), or manually clear your browser's site cookies and storage data. Always export regular .cur or .zip backups at major milestones to secure your work!