Click on the Tampermonkey icon in your browser extension bar
Scroll down to and click the word Dashboard, with the gear icon next to it
Find the userscript you want to edit, and click the Edit icon on the far right. This will open an edit page.
Look for the bits you can edit, which is vague because people set things up differently. Sometimes there will be a /Config/ section, sometimes it may say /CSS styling/, etc. If you poke around in the specifics I explain below, you should get enough of a feel for it to be able to poke around in other scripts and see where you can safely make changes if you want.
In general, to start editing a userscript:
/Config/section, sometimes it may say/CSS styling/, etc. If you poke around in the specifics I explain below, you should get enough of a feel for it to be able to poke around in other scripts and see where you can safely make changes if you want.