This applies to all versions of SAS (at least back to version 6 and up to 9.4!) and, as far as I know, all operating systems. I am using 9.4 on Windows 10.
Often, with paired data, one variable is a later version of the other. So you might have, e.g. test1 and test2, where there is training in between.
If you run:
title "Paired t tests";
proc ttest data = DSNAME;
paired test1*test2;
run;
then you get (among other output), the mean and sd and t test and so on of test1 - test2. This is backwards of the way I think (and I think I am usual). What you want is test2 - test1, so that a positive value means it went up.
But you also get a graph called "paired profiles" which has test1 on the left and test2 on the right - which makes sense.
There should be an option to change this so that the output makes more sense.
(Yes, I know it's easy to just change the sign for the results, but .... we shouldn't have to do that!)
