When using a knife and fork to eat, take the knife and fork from the outside to the inside, hold the fork in the left hand and the knife in the right hand; cut something with the left hand to hold down the food with a fork, and the right hand to hold the knife to saw it into small pieces, and then use the fork to send it into the mouth. When using a knife, the blade must not be turned outwards. When you put down your knife and fork during a meal, they should be placed in the shape of a "figure of eight" on the side of the plate. The blade of the knife should be facing away from you to indicate that you want to continue eating. After each dish, place the knife and fork together on the plate. If you are having a conversation, you can hold the knife and fork without putting them down. When you are not using a knife, you may hold the fork in your right hand, but if you need to make a gesture, you should put down the knife and fork, and never wave the knife and fork in the air, nor hold the knife or fork in one hand while wiping your mouth with a napkin in the other, or hold a wine glass in one hand while picking up the food with the fork in the other. Remember, at no time should one end of the knife or fork be placed on the plate and the other on the table.

Reference:

Western food rules