This advice applies mainly to Peco brand points. Other brands may have a similar technique to adjusting their spring tension.
Sometimes you may find that points are too loose or too stiff.
For the point illustrated, to increase the tension move the Spring Tension Bar to the left. To reduce the spring tension and make the point easier to change move the Spring Tension Bar to the right.
It's best to use a small flat bladed screwdriver to gently move the Spring Tension Bar.
This advice thanks to David who helped out Doug with a troublesome point at Araluen.