Gui Scaling - Not to scale outside of studio

[RMofSBI]

This tutorial should help, since your resolution changes when you leave studio and join in game, or you use a different device:

UI Scaling & Positioning Workarounds 101

[Scaling] Anybody new to interface designing within Roblox studio will get to know the fact that Roblox doesn’t exactly have the friendliest UI editor pretty quickly; on the first few pages of the Art Design Support category itself you can already see three posts talking about the same issue.

Reference

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