Focus points
Normally you can focus on players in game. Focus points allow you to focus on stationary points or NPCs. A focus point can be a part or an object value pointing towards a part. There is no limit on the amount of focus points and you can name them whatever you want.
Parts
If you add a part to the FocusPoints folder, it'll be treated as a focus point. You can insert its name in the focus window in-game to focus on that part.
ObjectValues
You can add an ObjectValue to the FocusPoints folder and set its Value property to a part you want to focus on. For example, if you want to focus on an npc, you can add an ObjectValue named after it to the FocusPoints folder, and then set that value's Value property to the head of your NPC.