F1 Disk (local disk), display local disk directory
F2 U disk, display U disk directory
F3 View (preview), display current part figure
F4 Search, search file as file name
F5 New, build file folder
F6 Copy, copy file to U disk and local disk
F8 OK, confirm input or choose
Enter key: choose current file
Del: delete current file
PgUp: pageup
PgDn: pagedown
Right key: enter file
Left key: exit file
F3 preview current parts figure