"I'm into some really obscure icons; you probably haven't heard of them…"
How the fuck does a diagonal arrow obviously mean Home, or End?
And apparently an up or down arrow with two lines through it means Page Up or Page Down! OF COURSE! That's much more straightforward than, I don't know, 'PgUp' or something…
I searched all through the OSX help trying to find what those magical symbols meant. Eventually gave up and asked google "mac osx shortcut icon up arrow with lines through it" — which took me to this good cunt's page, which has a handy graphic explaining this cryptic bullshit. Sigh.