Hello Malc! Thank you for answering!

I've already created my own Custom pages with Custom fields (did you mean "textbox" Custom fields?) but I have trouble going to the next step

**you can include it in any list you call up in the right-hand pane
Is it the same thing as using "add" option in Preferences->Database->Edit selected list? But then I don't need to create a new field for it, I can just type a line in "add" window? Or am I wrong?

and....where is the right hand pane that you mentioned? In which window is it?

Did you mean that I can just add a new line to already existing "build-in" lists, such as Category, Genre, Location, etc?

Thanks again for your help!!
Mike