Apple Macintosh PhotoFlash - Manual (Page 59)

To select several areas of an image and keep them all selected, follow
these steps:
1 Select one area of the image.
2 Hold down the Shift key and select the next area.
You can choose a different Selection tool if you wish. The second selection
may overlap the first selection.
3 Repeat step 2 as many times as you need to.
A moving dashed line surrounds the currently selected areas. If you use
an Action tool anywhere within a selected area, the action affects all the
selected areas.
Subtracting from a selection
After you’ve selected an area, you can use the x key to subtract from the
selection. Follow these steps:
1 Select one part of the image.
2 Hold down the x key and select another area that overlaps your first selection.
49 Working With Selections
Area selected with
the Marquee tool
Area selected with
the Lasso tool