Normally I just click in the page margin so nothing is selected, then move my mouse over the columns, without clicking, until I get over the line and the mouse turns into a double-headed arrow.  Then I click and drag the line to the correct width and let go of the mouse button.

Thanks. Odd. I can do this at home (Pro), but not at work (Quantum). Perhaps accessibility over an internal network is the issue.

I will try the following at work: isolate the form on my computer desktop and work from there.

It worked in a 'Test' company under single-user 'sysadmin' when nobody else was logged into Sage.. So, now I can adjust column widths and save the *.sfm file for use by all. Thanks.