Pull out the dipstick and wipe it clean. Then put it back in and pull it out again. Check the oil level at the bottom of the dipstick.
If the vehicle has been driven for at least fifteen minutes, use the marks next to the H (hot).
If the vehicle has not been driven, use the marks next to the C(Cold).
Transmission fluids expand when hot.
Add transmission fluid is low. Remove the dipstick and put a little funnel on where the dipstick sits. Then pour the transmission fluid into the funnel.
The arrow indicates where to put the funnel when adding transmission fluid.