There is not much to talk about here. Zooming in and out is a basic feature of all text editors and, literally, every tool to work with the texts and graphics: Google Docs, Google Slides, and Google Sheets, Microsoft Word, Excel, Adobe Photoshop, for example, and basically, everything.
Watch the video from https://thegoodocs.com/ and find out how to zoom in and zoom out in Google Docs:
So, we have shown you how to zoom in and zoom out in Google Docs with the help of this button with the percentage.
Or, by the way, you can zoom in or out the entire page via your browser.
We hope this tutorial will help you learn how to zoom in and zoom out in Google Docs. Good luck!