Syntax

[the] roundHeight of <buttonOrGraphic>

if the roundHeight of button 1 is unset then ...
set the roundHeight of button "Quit" to 4

Explanation

The roundHeight property lets you control the corner-roundness of buttons with style roundRect. The roundHeight is the radius of the little circle that makes up the rectangle’s corner at its tallest.

Illustration of what roundWidth and roundHeight are

See Also