You want a shape to change its size depending on the quantity of the text on it. For example, a text field should be max. 10 mm high, but if more text is entered, the shape should “grow” along with the text quantity.
Open ShapeSheet for the master shape. In the section ”Shape Transform” select the field ”Height” and enter “TEXTHEIGHT(TheText,Width)“.
If you want to fix the maximum size of the text field (i.e. 10 mm), you have to enter “MAX(10 mm,TEXTHEIGHT(TheText,Width))”