Name Gallery - Stretching Properties
You can use Named objects to stretch other named objects. An example is the text on a button. Both the text and the button are named objects with the text flagged as stretching the button. Then when you change the length of the text (for example by typing in more characters), the button automatically resizes to match.
When you choose Stretching properties, a check box to the right of object names shows those objects you want to stretch (like the button in the example above). The check box gives a quick way of switching stretching on and off without changing the stretching options.
to the right of the check box shows if the stretching options are set up (solid arrow) or not (hollow arrow). Click the arrow to display the Extend dialog box which lets you set the options.