Which check format are you using? Do you have a stub on both the top and bottom, or just the bottom?
Leslie
For check with stub on bottom, these are the defaults:
H1- 312
B - 12
F1 - 48
For check with stub on top and bottom (Graphical), these are the defaults:
PH - 60
B - 12
F2 - 324
F1 - 36
PF - 48