You could add a popover button with a copy of the field placed in the popover, resized the field to fit the popover and then add scroll bars to the field. You can add a close button (-) with the script step close popover, but it is not need because you can click outside of the popover to close it.
And that's what happens when you don't tell the forum that you are not using the latest version. Tends to waste your time and that of the person trying to help you.
You could create two copies of the layout, one with the field or fields sized larger and then your button clicks switch you back and forth between layouts. A tool tip can also be set up to show the entire contents of the field when you hover the mouse over it.