Hi,

can I somehow copy/paste text without having to use middleclick in aterm and rxvt? I really hate copying a link from a IRC-channel with middleclick because it pastes the text into the channel's command prompt.

Also, how can I change the font in aterm and rxvt?

you might be confused in how it works.

copy is simply to highlight nothing more
you can leave it highlighted or left click and remove highlight it doesn't matter.
then get focus on where you want to paste with left mouse click on a text field or mouse over, however you have the window manager set to do focus.
then middle click will paste the last highlighted thing where the focus is.

to set font for say rxvt (applies for others as well)
make a file ~/.Xresources
in it put
rxvt*font: *fixed-bold-r-*-15-*-*
whatever font you want

the file is read automajcally when you log in or for changes and testing issue the command
xrdb ~/.Xresources