Board Thread:Support Requests - Getting Technical/@comment-24155515-20180503175137/@comment-168424-20180503234127

I suggest you ask Fandom staff via Special:Contact/general how to make a button or link to directly into source edit mode for Portable infoboxes. This is not just a VisualEditor problem, since even when Source editor is your preferred editor, you still get the PI GUI editor.

BTW, Monobook is an unsupported skin, so Fandom staff could just say "tough sh!t".