Open a print-preview window, that shows the specified page to print.
The PRINTPREVIEW action opens a Print Preview dialog (link), displaying the page that is selected for printing. Using this dialog you can get a preview of how the page looks like when printed. The dialog allows to zoom in and out.
An Action may use a Value and an Address Value: empty Address: address of the page or object to view the print preview for (for exampe $Print Page).
If you select an address of an object that cannot be printed, or if no address is specified, a warning pops up stating what is the problem.
Synchronous or asynchronous
This action is performed asynchronously with data processing. If an action is asynchronous, it is performed only after all synchronous actions in a sequence have been called. A synchronous action is performed immediately.