At present, the only option to jump to a panel callback is Ctrl-P shortcat from the UIR editor (or Code >> View >> Panel callback menu selection). Even longer is to generate a panel callback, which can only be done via Code >> Generate >> Panel callback menu chain.
I'd like to have added two options to panel context menu in the UIR editor: Generate Panel Callback and View Panel Callback, in the same way as those options are present in a control context menu; something like this: