Option key acts as function key.

[kegl]

Could this feature be added to DoubleCommand? Or even better: right option key acts as a function key.

Here is the reason: to page up/down you need to press the function key, which is at the left edge of the keyboard, together with the arrows, so you need two hands. On my old MacBook I reprogrammed the enter key just beside the arrows to the function key. On my new MacBook for whatever reason the keyboard has changed: the old enter key became an option key which I cannot set to fn key right now.

[Hilmar]

I would like to put in a 2nd vote for "Right Option key acts as Function Key".  I much prefer one handed paging.  I would like the left option key to remain as is.

They (Apple) really need to add PgUp/PgDn keys above the left/right arrows, the space is there…

[kegl]

I solved the problem using KeyRemap4MacBook

[Hilmar]

KeyRemap4MacBook worked great, thanks!