MS Project Tips from Critical Tools site

25 Microsoft Project Tips and Tricks

1. In the Gantt Chart, doubleclick on the right edge of a column header to "best fit" the column.
2. To quickly change the name of a column, doubleclick in the column header and enter a new name for the field in the Title field. For example, you may want to abbreviate the Duration field name to Dur to allow the field to be narrower.

Refer Critical tools site for more...