Where is the undo command

[Gwizz]

I'm been tired lately ( good excuse I guess) and have been making circles of track.  I forgot how to use the undo command.

Anyone remember how to do this in RRT2?

[sleeper]

I don't think there was one (only appeared in RT3).

I always used to save game before track-laying and reload if I made a mess.

I still use save game in RT3 before tracklaying in case placing a station or water tower messes up my nice new track.

[Gwizz]

Originally PopTop did not have an undo, but seems like PopTop put out a key command for an undo of the last move.  But, You may be correct as my memory sometimes forgets to touch second base on its way home.