I HATE WITH A DEEP PASSION THAT IT DOES NOT AUTO SAVE AND IT DOES NOT HAVE A BACK OR FORWARD ARROW!!!
I have been trying to finish typing in a PDF document and I almost finish writing and suddenly, the entire work I have been typing disappears!!! It has happened several times. If there was auto-save and back and redo arrows, this would make the awfulness of this situation disappear.
PLEASE CONSIDER ADDING THIS TO THE FUNCTIONS OF XODO