This Plugin will put your menu icons in a stack, placed in the bottom right corner of your page. if The stack clicked, a pop-up menu will appear.
Decompress the .zip archive and put the “DynamicWPPopUp” category into your plugins directory (/wp-content/plugins/).
Or the other way, with your wordpress admin page > Plugins > Add New then choose upload on the top. Next choose File (.zip) then Install Now. (see the screenshots)
Activate the plugin in the WordPress Plugins admin page.