PokerTracker

I want to convert my 6 max hands that I play shorthanded (3 players or less) to 5max. Is there a way to do this, or a filter for it?

Use the 6 max/5 max/1-on-1 Conversion button on the Utilities > Database Maintenance and Options window to do this.

You can only convert entire sessions that were played with less than 6 players, not individual hands.