In Impress, select /Slide Show /Slide show settings and choose your display screen from the dropdown at the bottom under "Multiple displays"; this may not be active until you have a second display connected; any monitor will serve as the second display for experimentation purposes. The Presenter console will not show up until doing /Slide Show /Slide Show with a second monitor connected.
It is good to experiment at home using any monitor as a projector substitute; note your choice of settings onto an adhesive label and stick that on your laptop, so you do not have to experiment in front of an audience.
Apache OpenOffice 4.1.3 on Xubuntu 16.04 (mostly 64 bit version) and infrequently on Win2K/XP
14 October 2016 was Pooh's 90th birthday