jQuery Grid Plugin - jqGrid

Hello.

I have a problem with the width of the columns. Initially in the grid there are only a few colums. Because they do not take the whole width available, I used the shrinkToFit option, so they expand and use the whole space.

But, the user can add extra columns (a lot of them) and because the shrinkToFit is set to true, the column are shrank to a very small size and the horizontal scroll bar never appears.

Is there a way in which I can make the columns expand if there is enough space, but not shrink under a certain limit (preferably defined for each column)?  Something like a min-width property.

Thank you.