Welcome to Hyksa!
Your friendly neighborhood hex editor.
Here are the basic keys that used for now:
Arrows, PageUp/Down, Home/End - Move around as you would expect
General:
C-? - Help (this screen)
C-Q - Quit
C-E - Edit file
C-W - Write a file
Editing:
C-O - Toggle between overwrite and insert mode (overwrite default)
Tab - Move between byte and ascii view
Del/Bksp - As you would expect
Edit using regular keys.
C-Z - Undo
C-G - Goto position
C-F - Find text/bytes
Selection:
C-S - Toggle selection mode
C-X/C/V - Cut/Copy/Paste respectively, as you would expect