Using the raster painting erase tools
Click an erase tool on the Raster Painting toolbar.
- Click the Erase tool . You can change the brush size with the Erase Size button .
- Click the Magic Erase tool .
- Drag the tool over the raster cells to erase them. When using the Magic Erase tool, connected cells are erased, although any connected cells that extended beyond the dragged box are not erased.