A named box, for a library component whose sheet would not read. The placement will fail too, and say why; this keeps the gesture working rather than leaving nothing to carry.

The symbol itself, drawn by the draw block's own renderer at the component's default parameters. What the user is carrying looks like what they will get. `Clocked` is carried rather than worked out from the type because CommonTypes.isClocked answers for a custom component by finding its sheet among the project's LoadedComponents, and a library component's sheet is not in the project until it is dropped. Everything placed from the project leaves it false and is answered from the model as before; a library component answers it from the sheet read when the drag began, so the clock mark is on the ghost of a clocked component rather than appearing only once it lands.