I do not think it has a scroll bar.
However, the simplest is 2 buttons up and down.
You save your entire. text string in an Original Var
But you show a temp string var on the string
Every time you press each of the buttons, it will reset the temp string var and recopy it again at the designated line.
Then creating a scroll bar after achieving this will be easy.
Using the height of the edit box. in a percentage calculation towards the number of lines (keeping in mind the text font size, line spacing, etc)
I will be done this a few times. I think with normal text.
I think there should be an automated scroll bar for edit boxes if this non, it should be on features to add.
It is also always smart to keep temp string vars for GUI and others for internal, as draw calls may vary. Lowering fps or drawing outside of the screen will automatically cost the battery some extra juice.