This warning light has come on, tyres are all at correct pressure as indicated by the indication just inside the drivers door. Is there a method of resetting.

Maybe worth increasing the pressures by a couple of psi to see if this extinguishes the warning.

You can always let out some air but also good to check you don't have a slight leak on one of the tyres.

Resetting the pressure settings on the vehicle may just be masking a fault in one of the tyres

Also, ensure you check the tyres when cold