So no pinching and TPWD says to?
Brazos
Use these guidelines to measure fish correctly (total length):
1. Place the fish on its side with the jaw closed.
2. Squeeze the tail fin together or turn it in a way to obtain the maximum overall length.
3. Measure a straight line from the tip of the snout to the extreme tip of the tail fin.

No tail pinching is the answer. Good luck Big Al.
This is valid question. The issue that I see with pinching the tails is this. Someone could post a 27" redfish with the tail pinched making it 28". Then another person could post a 28" redfish without the tail pinched. The argument could be made that the 28" fish would be "OVERSIZED" if the tail was pinched. Therefor it would be disqualified.
I would like the "No Pinched" tail rule to stand for this challenge.
Darth, to answer your question, if you are using a bump board and you position the nose of the fish towards the top or bottom of the "BUMP" so that the full length of the tail is shown on the "BOARD" then that is OK as long as the tail has not been pinched and the nose is in full contact with the bump and the mouth is closed. This should not create an advantage or disadvantage for anyone.
I will review the Pinched tail question with the Mods for future challenges.