Popups Display In Front of Screen Content
Figure 1 (above). The CSS ' z-index' property determines the order in which elements appear along a z-axis coordinate in a web browser. In Popup Maker, the overlay and popup layers appear in front of the browser content.
Image source: https://tympanus.net/codrops/css_reference/z-index/
Customizing the Popup Overlay Layer from a Popup Theme
Disabling the Popup Overlay Layer from the Popup Admin
The popup overlay layer is enabled within each new popup. Plugin users can disable the overlay layer from the Popup Admin. Go to ‘Display Settings’ >> ‘Overlay’ >> ‘Disable Overlay’ and select the checkbox.
The checkbox description says: “Checking this will disable and hide the overlay for this popup.”. Select the popup ‘Update’ button to save your changes.