To specify the default type of i-drop content
The only i-drop content types that are listed are those for installed Autodesk products that provide this type of i-drop functionality.
If the representative i-drop content image you drag into your drawing points to more than one type of content, this setting specifies which type of content is actually inserted. Selecting Block specifies that a block is inserted. You can drop a block into a drawing that was created in any AutoCAD-based product.