F3 + F4 Gamemode Switcher for Older Versions

 > **Brings the vanilla Minecraft F3 + F4 gamemode switcher to older Minecraft versions.** A lightweight, client-side Minecraft Forge mod that faithfully ports the familiar **F3 + F4 Gamemode Switcher from Minecraft Java Edition 1.16.5** to older Minecraft versions. It recreates the original interface, controls, gamemode order, quick-switch behavior and vanilla visual style without adding unrelated cheat menus or gameplay features. *** ## **Overview** Hold **F3** and press **F4** to open the vanilla-style gamemode selector. The vanilla order is preserved: **Creative → Survival → Adventure → Spectator → Creative** The world remains visible behind the selector, and the interface automatically adapts to the current Minecraft GUI Scale.  *** ## **Features** * Faithful port of the Minecraft 1.16.5 F3 + F4 selector * Vanilla interface, slots, icons, text and hover behavior * Original vanilla gamemode switcher texture * Original Minecraft item renderer for gamemode icons * Quick switching between the two most recently used gamemodes * Correct one-step cycling for every individual key press * Keyboard and mouse selection * Optional local vanilla permission check * Optional pause behavior * Client-side installation * No additional dependencies * No server-side installation required The selector uses the vanilla resource: `textures/gui/container/gamemode_switcher.png` No custom or modernized replacement interface is used. *** ## **Controls** 1. Hold **F3**. 2. Press **F4** to open the Gamemode Switcher. 3. Continue holding F3 and press F4 again to cycle through the available gamemodes. 4. Release **F3** to apply the selected gamemode. Holding F4 continuously does not rapidly cycle through every option. Each distinct F4 press is processed only once. Press **Escape** to close the selector without applying the selected change. Gamemodes can also be selected using the mouse. *** ## **Quick Switching** The first F3 + F4 press highlights the alternate gamemode used previously instead of selecting the gamemode that is already active. This allows fast switching between your two most recently used gamemodes. Examples: * Creative → Survival * Survival → Creative * Spectator → Creative * Creative → Spectator When you manually select a different gamemode, the gamemode you just left becomes the new previous gamemode. If the selected gamemode is already active, the selector closes without sending an unnecessary change request. *** ## **Improved F3 Handling** Older Minecraft versions may process F3 before detecting the F3 + F4 combination, causing the debug screen to briefly appear. The mod uses a short grace period of approximately **150 milliseconds** to distinguish between: * F3 by itself * F3 combined with the configured activation key If the activation key is pressed during this period, the normal F3 action is consumed and the selector opens without visible debug-screen flicker. F3 by itself continues to control the normal Minecraft debug screen. *** ## **Configuration** The mod includes an options screen with the following settings: ### Activation Key Choose the key used to open and cycle the selector. Examples: * F4 * K * Any other supported keyboard key ### Activation Mode Choose how the selector is opened: * **F3 + configured key** * **Configured key only** ### Vanilla Permission Check Controls whether the client performs the normal local vanilla permission check before opening the selector. Disabling this option does not bypass server permissions. ### Pause Game Choose whether the game should pause while the selector is open. ### Default Settings * Activation key: **F4** * Activation mode: **F3 + F4** * Vanilla permission check: **Enabled** * Pause game: **Disabled**   *** ## **Permission Behavior** This mod does **not** bypass Minecraft or server permissions. In multiplayer, the mod uses Minecraft's normal gamemode-changing mechanism. The server has final control and can accept or reject the request normally. The **Ignore local check** option only allows the selector to open when the client-side check would otherwise block it. It does not grant permission to change gamemode and does not bypass server security. In singleplayer, the mod follows the normal rules of the integrated server. Cheats or sufficient permissions are still required. *** ## **Multiplayer Compatibility** The mod is client-side and normally does not need to be installed on the server. It works on multiplayer servers where the player already has permission to change gamemode. Possible conflicts may occur with mods that modify: * F3 or F4 keyboard handling * The debug screen * Gamemode commands * Keyboard input events * Minecraft GUI rendering * Player controller behavior *** ## **Project's Goal** This project started from a simple personal need. While playing older Minecraft versions, I wanted to use the familiar **F3 + F4 Gamemode Switcher** available in newer releases. I searched for a mod that faithfully brought this feature to older Forge versions, but I could not find one that worked exactly the way I wanted. At first, I decided to create the mod only for myself. My goal was to reproduce the vanilla Minecraft 1.16.5 selector as closely as possible, including its interface, controls, quick-switch behavior and gamemode cycling. After getting it working, I realized that other players, modpack creators, developers and server administrators might be looking for the same feature. Instead of keeping it as a private project, I decided to publish it so that anyone using older Minecraft versions could enjoy the same convenient vanilla gamemode switcher. The project remains focused on one purpose: bringing the original **F3 + F4 Gamemode Switcher experience** to older Minecraft Forge versions in a lightweight and faithful way.