These commands are similar to those in Across Lite 2.x.
Arrow keys advance the current cell or change direction.
Shift-arrow moves to the next or previous word.
Ctrl-arrow changes direction only.
Enter goes to the next word.
Tab and Shift-Tab move to the next or previous word.
Home and End go to the beginning or end of the current word.
Shift-Home and Shift-End go to the beginning or end of the grid.
Delete, Space and Backspace clear the current cell.
Letters (only letters, not numbers or symbols) enter that letter and advance the cursor to the next blank (or optionally next square) in the current word.
Ins allows more than one letter to be entered into a single square, or use the "Enter rebus string" link at the top of this page.