How to add an electron without the box

[giacomomarchioro]

Hi,

Is there a way to add an alpha electron without the box? In order to display a spin orbital. When using
diagram.add_electronbox(level_id=10, boxes=0, electrons=1, side=7, spacing_f=10)
it automatically adds a "down electron".

thank you!

Originally posted by @chemchick in #16 (comment)