Chop Top Question..??

my blazer is gettin the top chopped and i had a question about ther glass getting cut. i herd that only the windsheild can be cut and that i need to get all new class made for the sides and back window...is this true? i won't be able to cut them down like ym windsheild? if any one has any info on this and on how much it cost to get done please let me know, thanks.