You CAN click the mechanical pencil back!!! And it's really simple! All you need
to do is slightly unscrew the... "transparent grip portion"... whatever that's
called... of the pen before you "knock", then just screw it back! Oh my god my
pen vocab is really sketchy. Anyways, as stated previously, your fingers will
quickly tire from gripping such a slim device so it's more of a "convenient
quick note" type of pen.