UIPadding is a new component which allows you to inset the contents of a GuiObject without needing to create an invisible Frame inside of it.
UITableLayout is a new layout type based around rows and columns, like a spreadsheet, as opposed to the tile layout of UIGridLayout which is more like the Windows start menu.
Excellent work on these new UI layout components. I can already tell UIPadding will be very useful for ScrollingFrames! This is exactly the kind of stuff Roblox needs to feel more professional and usable