I noticed when created my canvas UI’s (ex. buttons, sliders, etc.) and then manually adjusted the screen size. The UI’s doesn’t scale properly. How do I apply a fixed screen resolution, where the UI’s scales accordingly?
Add to your Canvas a component type Canvas Renderer, and set the resolution manually. This will scale the way you describe when done properly. You need to reference the unity docs regarding UI.Canvas Unity Connect and here http://docs.unity3d.com/ScriptReference/UI.CanvasScaler.html
Good luck