Determines whether the prompter will automatically resize to the size of its content.
true or false. When true, the prompter will automatically resize to match the size of the page displayed inside it. If false, the prompter will be sized according to the prompter_width and prompter_height properties.
The size used will be determined by the browser and may vary slightly from browser to browser. It may also be affected by the initial size set with the prompter_width and prompter_height properties. For best results, make sure your prompter content page explicitly sizes its content so that the browser doesn't have to decide for itself. Note that most browsers will expand the prompter if necessary but it will not make it smaller. Some browsers may make it smaller vertically but not horizontally.