7 STEPS
1. Click Share.

2. Click Restricted

3. Click Anyone with the link

4. Click Viewer

5. Click to change that to Editor

6. Click Done

7. That’s it. You’re done.

Here’s an interactive tutorial
https://www.iorad.com/player/2749551/Google-Docs—How-to-Create-a-Share-Link
Open resource ↗