>>>Why the adjustment is different in design-time and in run-time, that's the question.
>>
>>I believe it's the same, but column width may get 'adjusted' automatically in run-time.
>
>AFAIK there is no code behind the scene adjusting the original width of the columns, that's why I find this strange behavior so irritating.

Sometimes, grid adjusts column width to recordsource field's width, if 'default' value left in property sheet.