"To change the angle" means to alter the way you approach or view a situation or problem. It involves looking at things from a different perspective or considering different factors to gain a new understanding. Full definition
The rate of energy production can be adjusted simply by changing the angle of the device, thus speeding up or slowing down the rate of flow. (sciencedaily.com)
The suspension trainer uses body weight resistance and allows for «progressive resistance» just by changing the angle of pull with the foot position. (ashotofadrenaline.net)
Moving the stick up or down will change the angle in which your gun fires bullets. (nintendoenthusiast.com)