question

Hi, I have a flow item that, when loaded on to a processor, is not visible through a glass window on the processor. It is visible through an open gap in the processor, so I know it is in the correct position, but it can't be seen through the window. I gather this has something to do with the relative rank of objects in the tree, but the flow item is in the Tools section of the tree, and I can't figure out how to rank it below the processor.