If the user switches between physical and electrical mode while a push is active, the symbol currently being edited remains the target, but the cell becomes top-level (not in a push) in the new mode. If the original mode is returned to without editing a different cell, the push stack is retained. If a new cell is edited in the new mode, through a push or otherwise, the original push context is lost. This context is also lost if the Clear function in the Cells Listing from the Cell Menu is invoked.