The Popup Settings pane allows you to enable/disable the popup features.
The settings options are listed below:
Select the layer or popup in Pages navigation pane.
Header: Enable or disable a header for a layer/ popup.
Close: Enable or disable close icon for a layer header.
Back: Enable or disable back icon for a layer header.
Share: Enable or disable share icon for a layer header.
Open in full screen: Configure to open in full screen mode.
Modal: If enabled, it is not possible to access the publication page unless the layer/ popup is closed with the Close icon. If this setting is set to "Off", the layer will close with a click on the background.
Mask color: Set the mask color (the background color) that appears when a layer/ popup opens.
Mask opacity: To either increase or decrease transparency (darker or lighter shade) for the mask layer.