ruler units, inches vs feet/inches

my ruler (using inches) shows “0 1’8” 3’4" 5’0" etc"
I want to see “0 20 40 60 etc”
I’ve done this before but I can’t remember how I did it. Something about type of dimension or something. Please let me know how.
Thanks,
Stan

using qcad 3.37.1, windows 11

See:

For the current drawing: Edit menu .. Drawing preferences (Ctrl+I)
For al new drawings use the Application Preferences section Defaults for … :wink:

Regards,
CVH