Minecraft wiki entry for Options, associated text: The options screen in the Android version before v0.7.0 Alpha.
The options screen in the iOS version before v0.7.0 Alpha.
Options screen from v0.7.0 to v0.7.5.
Options screen before v0.12.1 (Omitted the sound button and added the Skin button).
The options screen from 1.0.4 to 1.1.5.
The current options screen.