As above. You can push it over to the left to put it in manual mode in both D and S. Then push forwards to upshift and downwards to downshift. I’ve always wished it was the other way round tbh, push forward for downshift; downwards for upshift, as to me stuck shift setup is counterintuitive, and fir that reason I always use paddles for manual driving, but decent replacement shifters not the oem plastic stubby crappy ones.