What is UDim2.new used for and what does it mean?
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What is UDim2.new used for?
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UDim2.new is used for creating a new UDim2 (similar to how Vector3.new creates a new Vector3).
UDim2 is a data type ROBLOX added for positioning GUIs (just as Vector3 was added to position things such as blocks). UDim's have an Offset and a Scale, and UDim2's have an X offset and Scale and a Y Offset and Scale (hence the name UDm2, since it is made up of 2 UDims).
If you want to learn how to actually use UDims for creating a GUI, there are many tutorials available on different websites. Here's a link to one ROBLOX wiki tutorial: http://wiki.roblox.com/index.php/Beginner%27s_GUI_Tutorial
UDim2 is used for GUI positioning/size.
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