I have a few questions about the creation/generation of certificates:

1. I want the certificates to be A4-landscape. I read on the forum I could do this in tcpdf_config.php. I looked into it and thought "I can change it into landscape but what happens if cjlib is updated. Will it be overwritten?"
2. Even if I have my usersettings to "no editor", when I open a certificate I'll see my editor. I tried to set the document to landscape with a @page directive, but not able to store because of editor settings. Is it possible to use the editor for questions, certificates etc, that is default for the user (i.e. no editor, tinymce, jce)? No editor would make certificate layout code creation much easier.
3. My customer wants the date of passing the quiz + 1 year on the certificate (valid until). Is it possible to use an override to make that happen and if yes, which one? 

best regards, Marie-Anne