[gentoo-user] logging output

when i type, for example "emerge --ask --update --deep --newuse @world", how do i capture the output to a file and see it on the display?  It doesn't all fit in the konsole buffer (or should i bump it way up?)  I ask because it apparently failed to install selinux but i couldn't reread it to see exactly what the issue might be.

mad.scientist.at.large (a good madscientist)
--