On this page you can examine and change the table of custom offsets for the current tuning. These are the offsets that appear in the yellow box after the "Cust" on the main tuning page if they are non-zero. You can also set all these offsets to zero with the "Zero All" button. Normally all these offsets are zero, so this is a rarely used feature. But if you have reasons for departing from the calculated tuning curve and establishing note-by-note exceptions, then this is the place to do it.  The offset you enter will be stored in the current tuning file and used any time that tuning file is loaded again. The offset for the current note also can be set from the main offset on the tuning page by dragging your finger from the offset in the upper right corner to the current note display. Custom offsets appear as red marks in the tuning curve graph. See the help for the main tuning page for more information on transferring the offset to the custom offset for the current note.