You can drag assets from the Solutions view onto the process editor's canvas as appropriate. For example, if you are creating a process and want to add a user task that is already listed in the Solutions view, you can drag the task onto the editor; Designer creates a user task in the process, with the correct Task Type ID.

You can drag a process model onto the process editor to create a call activity step. If the process model contains a none start event, the step is configured with callable process behavior. If the process model does not contain a none start event, the step is configured with referenced process behavior, and its Start Document and Return Document are both populated. For more information, see About Call Activities.

If you attempt to drag and drop an item that is not applicable for the editor, such as a process project, Designer does not add the item to the process.