Table Properties in Word - Mastering Table Sizing (aka "Percentage Sizing")

You have just added a column to the right of your table....and the table has expanded beyond the margin.  What do you do?

Right click the table and choose Table Properties.

Click the Table tab:

1. Ensure text wrapping is set to "None"
2. Set Preferred Width to be measured in Percent (as opposed to cm).
3. Select 100%.

All done.