Cursor

All windows have their own cursor setting.  

Selection

The cursor, when dragged, will highlight a selection.  The cursor can be dragged to the right or left of the initial mouse down.  As the cursor is dragged, the pitch and amplitude values show the changing edge of the selection.  The current frame range is also shown.

Hairline

By default, the cursor is initially set to be a hairline cursor.  As the cursor is dragged, it remains one unit thick.  This is useful for examining the pitch and amplitudes values by dragging the cursor across the plot windows.