1.11.6. Resize Columns

To resize a single column, click on the vertical line separating two column headers, then drag to the left or right while holding down the left mouse button. If you perform the above action while simultaneously pressing the Control key, all columns to the right of the one being resized will be given the identical width. Note that the equivalent operations also work for resizing rows.

The menu items under View >> Resize Columns offer additional options for resizing columns, as described here.