From FreeCAD Documentation
- Select one or more objects.
- If required scroll the Tree view to reveal the target container.
- There are several ways to invoke the command:
- Select the View → TreeView actions → Initiate dragging option from the menu. This option does not work on the Windows OS.
- Use the keyboard shortcut: T then D. On the Windows OS it is important that the mouse is already over the target container when this shortcut is entered, and stays there for the next step.
- Left click the target container.