F2; write mode
F3; monitor mode
F4; accept changes
1; N/O contact
2; N/C contact
3; Link N/O to line above
4; Link N/C to line above
5; Vertical line
6; Horizontal line
7; Coil or timer
8; Special instruction
9; Delete horizontal line
0; Delete vertical line
Insert; toggle overwrite/insert
Shft-insert; Insert new line
Ctl-insert; Insert new bit