Since the field is for read-only purposes, you can define a calculation field that returns the contents of this text field. This calculation field can then be placed on the layout and formatted with the scroll bar.
As far as I know, there is no way to change the width of the scroll bar in current verisions of FileMaker and FileMaker Go.
Thanks for the reply.
Would you elaborate more on Question 1...
Correct me if I am wrong: Do you suggest to use "Edit Box" control to show the calculation. If this is the case, is there any difference to show the textfield directly. Just to make sure that the keyboard will not come up?
Note: I don't have FileMaker Go so I can only answer from the perspective of how you would do this in FileMaker Pro.
Yes, specify Edit Box format with the Scroll Bar option enabled. The only difference between doing this with the calculation field and the actual data field is that the calculation field will be read only, where the text field would permit editing the field. You can use behavior settings on the regular text field to make it read only, but then you no longer have a scroll bar as the behavior settings will prevent you from entering the field and this is necessary before the scroll bar appears.