You can add a round or rectangular footing your column using the Cadimage Coverings Tool. The result will look similar to the image below (depending on your settings):
1. Go to your Plan View
2. Select your column
3. Go to Cadimage > Coverings > Column Coverings
4. Select the Cadimage Column Footing item:
For more information click link below
https://cadimage.zendesk.com/hc/en-us/articles/206272293-How-to-add-a-Footing-to-a-Column