Congratulations. You are making progress.
Nice but not possible. A developer can enable and populate the InfoBox with code. See attached.
Maybe. Did you try it? How to work with the modified geojson would be complex but it should be possible.
I and Evan already did that, didn't we? Where are you supposed to plug in the featurefromdescription block? - #2 by SteveJG and Where are you supposed to plug in the featurefromdescription block? - #3 by ewpatton . What you do to 'plug-in' depends on what you expect to achieve; create a series of run time Markers or a single run time Marker. Why do you want to use the CreateMarker Block? Whether a developer uses a design time Marker (for example Marker1) or uses a run time Marker (using the CreateMarker) depends on the purpose. Design time Markers are simple to use; run time Markers are more complex. Each type of Marker has advantages. Look at my example or do the National Parks tutorial or use the you can connect to the input of the evaluate but ignore result Block. Try those methods on a stand alone Project.