For at or til at 1
For at means in order to. It is the answer to the question why? The focus is on the motive behind the action:
Han tog kniven frem for at skære sig et stykke brød (He took out the knife in order to cut himself a slice og bread)
Til at means meant for. It is the answer to the question: For what purpose? The focus is on the tool or ressource.
Han købte en kniv til at skære brød med. (He bought a knife for cutting bread)
Choose for at or til at in the drop-down list