The Hex mode status bar has 4 sections: cursor position, filesize, hex word width, and insert mode.
The cursor position section shows the current status of cursor and selection:
The filesize will also be shown in decimal or hex, depending on the current line number format setting.
The hex word width field indicates the current hex format setting, a BE indicates Big Endian instead of Little Endian.
The Insert mode field, indicates INS for Insert Mode or OVR for Overwrite Mode.
See also: Hex Mode Line Numbers Cursor View|ShowStatusBar