Tool ERASER

From RealWorld Wiki

ERASER is a drawing tool capable erasing pixels (replacing them with pixels with alpha channel set to 0). Since ERASER is a meta-tool, it requires another tool to specify the pixels to erase.

ERASER is a very simple meta-tool. It uses the underlying tool with solid fill and transparent color. The advantage of the eraser tool is the ability to have different tool configuration for normal painting and for erasing when using for example the flood-fill tool.

The raster editor layout comes with 3 predefined eraser tools: ERASER_PENCIL, ERASER_RECTANGLE and ERASER_FLOODFILL, which should be sufficient for most uses.

Erasing pixels is used for example when making background transparent.