Thread:Scorpion6660/@comment-35829463-20180705065831/@comment-33460885-20180709054206

You go into edit like editing the page or heading. Then click on the photo. You see the file name. You click it. A thing pops up. There is options on the side  "general settings"  and "advanced settings"

It might look different in Firefox but I don't think it should. I use Chrome for everything. Just play with it on the test page