You can add context to your models with Context buildings. These items work the same as Buildings, however, they are not divided into levels and their areas are not quantified in the Reports.
Context buildings can be created using strokes (as outlined below) or you can Import context to bring these in for your location.
To create Context Buildings simply select the Context Tool in the Main Toolbar
When drawing the Context buildings, it will quite often be quicker to disable Automatic item creation in the Drawing settings, this will allow you to draw longer strokes that are all in line and then clean them up and tap to create the buildings.
You can edit Context buildings in all the same ways as can edit Buildings:
Context can be hidden using the Display & Drawing Options.
You can set them to display as transparent or outlines. Or, simply hide when they are in the foreground.