I want to record a powerpoint presentation.Whenever I import the powerpoint there is a red box and two mice marks on the screen around the presentation and I can't get the slides to advance.
Realize - you aren't "importing" PowerPoint, you are ONLY displaying it (via a Display or Windows capture, personally I use Windows Capture... a forum search will turn up the instructions to get PPT to use a Windowed vs Full Screen slide view). You can't, by default, control PPT (or any other content from a Window/Display capture) from within OBS. You can't click on parts of the displayed source and interact with it [anymore than if you were watching TV, and wanted to touch the screen to interact what someone else was broadcasting]. OBS is just displaying it. If you want to advance the slides in PowerPoint, go to PowerPoint and advance the slides, which you will then see in OBS. Or look for plug-in / scripts which enable some 'remote control' of PPT from within OBS.