Launcher Preferences

Tap the gear icon on the launcher home screen to open Settings.

Java Settings

SettingDescription
Java RuntimeChoose between OpenJDK 8, 17, or 21
Java ArgumentsCustom JVM arguments — see Java Arguments guide
RAM AllocationHow much RAM to give Minecraft (default: auto)

For Minecraft 1.17+, you must use Java 17 or higher. Copper Launcher selects this automatically.

Renderer Settings

SettingDescription
RendererGL4ES (default), VirGL, MobileGlues
Renderer String OverrideSpoofs a different GPU string

Launcher Settings

SettingDescription
ThemeSwitch between Copper (default) and other themes
LanguageInterface language (Crowdin community translations)
Show LogShow the game log window during launch

Experimental Settings

Experimental settings may cause instability. Use with caution.

SettingDescription
Turbo ModeDisables frame limiting for maximum performance
Force VsyncForces vertical sync
Use alternate surfaceAlternative rendering surface (helps on some devices)