When I go into Roblox Studio settings, I see something called GraphicsMode and I have no clue what the options mean. Can somebody help me out? Here are all the options:
Automatic (Default)
DirectX 9
DirectX 11
OpenGL
Metal
Vulkan
No Graphics
Always leave GraphicsMode at the default value, 1 (Automatic). Useless you are specifically targeting your game just for players with a higher-end graphics, for example (I have no idea why you would though :P).
Microsoft DirectX is a group of technologies designed for running and displaying applications rich in multimedia elements such as full-color graphics, video, 3D animation, and rich audio. DirectX9 and DirectX11 are two different verions of DirectX. Most graphics cards support DirectX9 now, but many do not support DirectX11 yet. Edit: Forgot to mention, DirectX is specific to windows.
OpenVL is a library for handling and processing volumetric datasets. It's mostly for writing applications and implementing algorithms which deal with volumetric data. OpenVL is specific to devices running Linux (That includes Android phones).
I've never read up on Vulkan, so I don't know much about it; and Metal, as the Roblox wiki says, is for Apple's graphics.