Modify the notifications of the mails with particular data

Hello everyone,

I would like to know how to modify the notifications that are sent after a test run,

For example, I need it to look like this:

I can not recognize the variables that are used to display information.

For example:

 Where can I find these variables to see which one I use ?? ,

I need the email to show the information of the images, or have a list of variables to be able to assemble the template myself

Thanks, I await an answer