DUF - Digit limit on Text boxes

[Vangard]

The digit limit on Text boxes cannot by set to infinity by deleting the current limit. It will go to zero instead.

For example, the default text box for showing $rd $rh. I made it 4 when I wanted to fit it carefully in a small area, but now I have a big area that can fit more numbers and wanted to remove the amount. When I delete the 4 and enter a blank amount, it shows 0.