build 3.2.0 does not seem to match wiki on Metal documentation
I believe there may need to be an update to the docs on how to turn on Metal-based rendering when battery is being used, at https://gitlab.com/gnachman/iterm2/wikis/Metal-Renderer. The docs say Metal-based rendering is by default disabled "[w]hen your device is not plugged into a charger. This is controlled by Prefs > Advanced > Disable Metal renderer when not connected to power."
I didn't find the setting there; instead I found it under an "Advanced GPU Settings..." popup from Preferences > General.
- iTerm2 version: Build 3.2.0
- OS version: macOS Sierra 10.12.6