Looking for some help as to where to start.
I'm looking to make a pop up info window when a user click on a feature(polygon). The style I'm looking for resemble the pop up that Google have when search for Speed Test in Google search and click on the "Run Speed Test" blue button. Once clicked on the "Run Speed Test" a info box pop up with the background shaded gray(please see the attached picture for reference). Any idea on how to accomplish this kind of pop-up style, preferably in 3.x. Minus the graphic gauge of course. Thanks in advance.