That was fun. I did some editing in Moodle Docs. Now have an Add/edit certificate module page. Move stuff from mod/certificate/mod. I also added what amounts to a duplicate set of settings instructions on Certificate module.
Noticed there were no pictures of a certificate on the certificate module page. So I added 3 images. Decided to go all out on the 3rd one, just to show I have no sence of style Copy attached.