# Show popover The action allows the developer to show a popup window with a given width and height. It supports HTML as well as embedding master visualizations.
The "**Value**" parameter defines the body of a popup window. HTML can be used to format the content. A Qlik expression can be used in the “Value” parameter by prefixing it with an equals sign and a text content should be enclosed with single quotes. It is possible to **embedd a master visualization** using the following syntax: ``` $object_id{css styles} ``` ***object\_id*** - identifier of the master visualization object. ***css styles*** - the CSS styles to apply to the embedded object. Example: ``` $9bc03224-f072-439f-b0de-3014860d4f8a{width:100%;height: 40px} ``` 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.

Popover with the Close Button