I would like to change the amount of space that is added when I do Format → Line spacing → Add space before paragraph. It is possible to change this in Microsoft Word. Is there a way to do this in Google Docs?
This works if you have powerpoint online or for desktop. Download the powerpoint from google slides (file > download as > Microsoft powerpoint). Open the file in powerpoint. Find the slide(s) that have the issue. Then go to Line spacing options as shown in picture one. Then change the spacing. You can then either reupload the file to google slides (when not collaborating), or use import slides, and import everything (make sure no one has edited anything). You should be able to change the theme so that is the default, so new slides will be this way too.