For printed documents I prefer inches since letter paper is 8.5" x 11" and there are common chars/inch, lines/inch, and of course 72 points/inch. With Google Sl

For printed documents I prefer inches since letter paper is 8.5" x 11" and there are common chars/inch, lines/inch, and of course 72 points/inch. With Google Slides though I only use on screens and always just go by the ticks whatever they may be.