You can set the menu's Size to Absolute Pixels, to stop it from stretching relative to the screen's dimensions. But as @Snebjorn suggests, for more robust scaling it's recommended to create your button using Unity UI and integrate it into AC. A tutorial can be found here.
Switch immediately to Unity UI - fully supported by AC, BTW.
Hope I'm not offending Chris by saying it's now (post Unity 4.6) just a convenient placeholder in new projects, it shouldn't really be used in production grade projects.
Not at all - I don't pretend to be on the same level as Unity's dev team. It was necessary pre-Unity UI, but is definitely more of a convenience when prototyping now. The newly released v1.48 sorts out a number of lingering issues when working with Unity UI, particular with Inventory items.
Seriously, check the tutorial Chris linked to - and read the AC manual and the official Unity docs. It's an area where you can really crash the system - at least it used to be that way, might be better now.
Comments
yes i know but i use the Menu of AC , how i can do this ?
i will try with Unity UI !
what i did wrong ? i remove UI the system run ok but when create a new UI it error ......
My UI Prefab got missing script ....
let me try it again ....
i use unity Unity 5.1.3f1 (64-bit)
but in version 5.1.3 script is missing
i will try with unity version 5.2.0