is there a shortcut key to edit iPXE menu entry like PXElinux's "TAB" key

Hi,

Is there a shortcut key to edit iPXE menu entry like PXElinux's "TAB" key.

When I use PXElinux boot, I could test kernel options by edit the PXE boot menu entry.

But I can not find a shortcut key to edit iPXE menu like PXElinux.

thx