type the name into the find box in the PPM
before you do though, it might be worth trying menu>>system>>multiple monitor settings to see if that works for you
edit: working for me
Problem with AMD video card driver
Bionicpup64 built with bionic beaver packages http://murga-linux.com/puppy/viewtopic.php?t=114311
Xenialpup64, built with xenial xerus packages http://murga-linux.com/puppy/viewtopic.php?t=107331
Xenialpup64, built with xenial xerus packages http://murga-linux.com/puppy/viewtopic.php?t=107331