Two quick tips to point out.
1. If you would like to quickly see your site and see how something looks - use the Ctrl -. This will zoom your screen out. To go back to 100% - use Ctrl 0.
2. One other tip is when sharing something like a doc, slide, sheet, etc - make sure your sharing section is that it is available for anyone who has the link.
Embedded below is a GIF followed by a 1 minute and 58 second YouTube tutorial.