There are three Selection related buttons:
Play Selection, to only play the selected
segment. In combination with Loop Mode the selection is played multiple times. Use the
Selection icon from the selection
controls, or use the shortcut key SHIFT+SPACE.
Clear Selection, deselects the current selection.
Use the Deselection icon from the
selection controls, or the shortcut key ALT+SHIFT+C or
ALT+C. You can also use the shortcut key
CTRL+SHIFT+Z. This shortcut also cancels selection mode.
“Move crosshair to the left/right boundary of the
selection". Whether Selection Mode is on or off, you can move the
crosshair to the beginning or end
of the selection (Ctrl+/).