I'm a complete newbie, so first and foremost... My apologies to everyone...

I've managed to install Slackware on a rather old system that was given to me by some friends when they upgraded. Now, I know that by hitting Alt-F(1-6) I can switch between multiple sessions. I also know how to get KDE started by typing "startx". Although if I hit Alt-F(1-6) again, KDE uses that key combination as a command and doesn't switch to the other sessions. How do I fix/get around this?

Secondly, when KDE is running and a window opens (I've been kicking around in the settings and such), I can't see the bottom of the window. Not only will it be underneath the task bar but off the screen entirely. How do I get it so that the whole window displays somewhere where I can see all of it?

I've tried editing the config file for the display using the Slackware book but screwed that up royally and couldn't figure out a way to get the old settings back. I eventually just reinstalled Slackware to get the defaults back and I'd rather not have to do that again. How do I know what my monitor can handle as far as a screen resolution? 640x480 is really rather annoying.

Thanks!

For the switching part, use Ctrl-Alt-F1 etc.

Check the correct horizontal and vertical refresh rates from manufacturer's site and add them to xorg.conf.

is the screen resolution set too low for the window to display?

you can have a virtual window size so the excess is off the screen but comes into view when the mouse is moved towards it.