New theme...how to embed a screenshot?

I’m slowly figuring out the theme components, but how do you embed a thumbnail screenshot into it so it shows up in the dialog box instead of a question mark?

Hi ,

  • make your screenshot

  • visit the page: http://base64.wutils.com/encoding-online/

  • choose : “image to base64” and decode

  • take the decoded string and copy it to "<screenshot … …> in the emtheme file

    hope this helps