Custom certificate (plugin)

This may be the wrong way but it works for me.

I do it by creating a full page jpg image and add it to the mod/certificate/pix/ borders folder

then add the jpg as a border in the design.

you can move the text about in mod/certificate/type files

back the file up first

have a look at this for moving the text

https://docs.moodle.org/29/en/Certificate_customizing#Modifying_text_and_text_position_code_examples

Hi,

James has the easiest solution.   However ever if you want more logos as individual files you should look at the links James provided to MoodleDocs.  

I would defiantely recommend making a duplicate of a certificate (using a different name) to make sure that works.  Then as James suggested changing one of border images for one which also contains the images.   Alternatively you can add your own images, or replace the stock images with your own.  For example, I replaced one of the background image with a corporate seal and the "Team Work" image with  a logo.   If you want to have a different file name and a different postion, read MoodleDocs carefully.

Enjoy,

Chris