Here you can set the snap zone for screen borders, i. e. the'strength 'of the magnetic field which will make windows snap to the border when moved near it.
Yma gallwch osod y gylchfa snap i ffiniau' r sgrîn, h. y. 'cryfder' y maes magnetig a wna i' r ffenestri snapio i' r ffin pan yn symud ato.