Hi @amirj0914,

There are some examples of how to use the library in here, examples.

If you want to delete a layer from a document you can use:

doc.Layers.Remove("layer_name");

Being doc a CadDocument.

Unfortunately there is no easy way to scale objects right now, so you will need to iterate throw all the entities and apply the new scale.

I'll open a branch and attach it to this issue to keep track.