hexpad

A terminal hex editor for binary files. It has GUI interfaces such as menus, document tabs and mouse.
Start menu - F3 or Mouse click.
Text edit

 Selection           - Shift+Arrow keys or Mouse drag.

 Cut/Copy/Paste      - Ctrl+X/Ctrl+C/Ctrl+V.

 Scroll              - Mouse wheel.

Dialog

 Button and checkbox - Enter or Mouse click.