Both.
The "put it on it's stand" is so that the bike doesn't fall on your head when you're crouched over trying to see the window on the right side of the bike lol.
Put it on it's stand but keep the stand on some elevated surface (like a brick or something), so the bike is "upright".
Honestly I just have my girlfriend check while I hold the bike upright, and I check hers when she holds her bike upright.