Tool SELECT
From RealWorld Wiki
SELECT is a drawing tool capable of selecting rectangular regions. It is also a meta-tool and can make use of other tools (brush, ellipse, ...) to modify selection.
[edit] Modifier keys
When SHIFT and/or CTRL keys are down while selecting, they modify the behavior of the tool.
- No keys - previous selection is overwritten by new selection.
- SHIFT - newly selected region is added to previous selection.
- CTRL - new selection negates the old selection (also known as symmetrical difference or XOR function).
- CTRL+SHIFT - newly selected region is removed from previous selection.
[edit] SELECT_ meta-tool
Any of the ordinary tools can be modified by the SELECT meta-tool to affect selection instead of ordinary pixels. To specify the meta-tool, use SELECT followed by an underscore and then the name of the ordinary tool. For example: SELECT_BRUSH or SELECT_ELLIPSE. The modifier keys apply to the meta-tools in the same way as to the normal SELECT tool.