I'm using PowerPoint templates from my company. In all of their slides, they have put some sort of grid lines outside of each slide. I want to remove them, but I cannot.
These lines cannot be removed just by deleting. They don't go away using any settings under "Grid and Guides". I wasn't able to do anything in Slide Master settings. Here's a screenshot from the Slide Master. Same lines can be seen in every slide.
It is very uncomfortable when scrolling slides up or down, because you have to do some extra scroll to get to the bottom of these lines to pass to the next slide.