Can I see fuel and timing maps at the same time. Are there short cut keys to change maps quickly?

Yes you can make a worksheet in scal and add the items you wish to view on the screen, Go to Worksheets – New – then Worksheet again and ADD CALL…You can then save this template and view it again easily by selecting the saved worksheet again under the worksheets tab..

You can add shortcut keys no problem by going to CAL in Scal and then EDIT SHORTCUT,  here you can add shortcuts for any map in Scal.