Switching from road to TT bike

when I did ftp tests I noticed that I had a lower ftp on my TT bike. Now that I’m using xert to calculate threshold, what is the best way to have my road and TT power numbers. I tried to do a workout at my road power today, but couldn’t hold the power numbers in my tt position.

If you’re going to be riding on your TT bike exclusively, manually save the signature on your latest activity to a lower value. If you are going to be alternating between them, best to simply scale workouts as you do them (available on the Garmin Xert Workout Player at the moment). If you’re importing into Zwift, use a lower FTP.