I'm new to chitubox and can't figure out how to remove a model. I put 3 models in the program. Scaled them to size so I could print them all individually and they'd match. 

I then done "save all models" so I could import them all at the same scale. 

I done my first print of 1 model. Now trying to print model #2. I can't cause I can't figure out how to remove the other 2 models. 

Thanks for any help!