Opening and closing event handlers in the editor

Like form definitions, event handlers can be opened and closed to reveal and hide the code within the handler. This can be useful when modifying programs as you can first open up the form by double clicking on the plus sign before the DEFFORM statement, this will then show all the event handlers within the form definition. You can then double click on the plus sign before the required event handler to display the program code for that event. The handler can then later be closed by double clicking on the minus sign.