The "Width" and "Height" parameters allow the developer to set the size of the popup in pixels.
The "z-index" CSS property sets the z-order of a popover. Overlapping elements with a larger z-index cover those with a smaller one.
The "Close Button" checkbox determines how the popover is closed. If the "Close Button" check box is set, the pop-up window can be closed by clicking the close icon. Otherwise, the popup window can be closed by clicking on any object on the sheet outside the popup window.