Classic British Flight Sim

having just had my computer returned from repair, i have a program called futuremark on my hd left by the technician. once opened it gives a very detailed description of every working part of my machine. even more than the windows effort.
within the program there is a section detailing the video card. so there is a section on anti alaising. first what does this do and what would happen if i was to change the setting from as now none to any other setting. nothing happens within fs9 that i can see.
or would this conflict between ati / fs9 or futuremark. common sence tells to me leave alone,but i just want to know what this does.

http://www.futuremark.com/

thanks for the info andy. now i can find out what this program is realy about. must be the tech's main tool for repairing computers.

Just looks like a benchmarking tool to me.

Not much use for repairing, just to see how fast various components go.