I used to be able to set the FormFactor but now Roblox says it's deprecated and I can't find it in the properties of the part, so what is the new way to make a part thin?
Just before couple Roblxo Studio updates you needed to change your Part from Brick to Custom. Now you do not need it! Why? I can't answer why but just go to Model Site that is in Roblox Studio Top Hotbar. Then choose from 1 Stud to 1.5 Studs then select Resize tool select your Part that you need to make it Thinner click on it and resize how much as you can.I hope I helped you and you understand! :)