Parameter

Description

Undo/Redo

When you click on the arrows you can undo/redo the last actions you have performed.

Labeling Mode

Here you can select between labeling and erase mode. To switch the labeling mode, you can also use the shortcut Ctrl + D.

Brush Size

Here you can set the brush size of the labeling/erasing tool.

Note that the brush size can be changed alternatively by pressing the Ctrl key and using the mouse wheel (when the cursor is inside the image area.)

All Labels

When you click on Clear, all labels in the active image will be deleted.