c. Add text (pointers or otherwise) in CityEngine
You can add text using rules. There's a rule that puts text on a shape in ESRI.lib, which comes with CityEngine. The rule can be found here: ESRI.lib/rules/General/Text.cga.
Chris wrote a rule to create 3D text in scenes, and you can download the code from this post here:
https://community.esri.com/thread/71674#comment-459502
a. Add dimensions to 3D massing models that you create in
b. Add horizontal dimensions to roads & sidewalks
I'm not sure what you mean by dimensions. You can create rules that can be applied to shapes. The shapes can be, for example, 3D massing models, streets, or sidewalks. With rules you can add geometry or colors or materials. So, you can extrude street shapes to make them have a third dimension. Or, you can change the material properties of shape (which could be seen as adding a fourth dimension) such as color, opacity, texture, and other properties.
