Connect Four on screen is a good small class game.

Here's a six row template in which a mistaken blue placement can be turned to red, but a mistaken blue placement cannot be turned to red and pieces can't be removed.

And here's a five row template in which mistakes can be corrected.

Ideal would be an option for a six row template in which mistakes could be undone.

If you have one, share it.

Or if anyone knows how to make that five row template into six row template, it would be much appreciated. (I tried copy and paste, but it didn't work.)