Close popup button In the button setting > Link > Click the ‘Dynamic Tags’ option > Actions > Popup. THen click the link box ‘Popup’ and select Action : Close Popup.

Starting from a blank popup WP > Templates > Popups > Add new > [give it a name]. When shown choose a template option just close it. Copying an existing popup design WP > Templates > Popups > Add new. When shown choose a template option select ‘My Templates’ Select the existing popup > Insert […]