Launcher Preferences
Tap the gear icon on the launcher home screen to open Settings.
Java Settings
| Setting | Description |
|---|---|
| Java Runtime | Choose between OpenJDK 8, 17, or 21 |
| Java Arguments | Custom JVM arguments — see Java Arguments guide |
| RAM Allocation | How 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
| Setting | Description |
|---|---|
| Renderer | GL4ES (default), VirGL, MobileGlues |
| Renderer String Override | Spoofs a different GPU string |
Launcher Settings
| Setting | Description |
|---|---|
| Theme | Switch between Copper (default) and other themes |
| Language | Interface language (Crowdin community translations) |
| Show Log | Show the game log window during launch |
Experimental Settings
Experimental settings may cause instability. Use with caution.
| Setting | Description |
|---|---|
| Turbo Mode | Disables frame limiting for maximum performance |
| Force Vsync | Forces vertical sync |
| Use alternate surface | Alternative rendering surface (helps on some devices) |