User guide

Pictures, Lines, and Shapes 173
Selecting areas to keep or discard
A pair of brushes for keeping and discarding is used to "paint" areas of the
image. The tools are called Keep Brush and Discard Brush, and are either used
independently or, more typically, in combination with each other. When using
either tool, the brush paints an area contained by an outline which is considered
to be discarded or retained (depending on brush type). A configurable number of
pixels adjacent to the outline area are blended.
To aid the selection operation, several
display modes are available to show
selection.
Show Original, Show Tinted, and Show
Transparent buttons respectively display the
image with:
• selection areas only
• various coloured tints aiding
complex selection operations
• checkerboard transparency areas
marked for discarding.
For Show tinted, a red tint indicates areas to
be discarded; a green tint shows areas to be
kept.
For Show transparent mode, a different
Background colour can be set (at bottom of
the Studio) which might help differentiate
areas to keep or discard.