Hotbar Slot Presets
A mod for PvP players that lets you assign two different keys to the same hotbar slot and toggle between them fast through the pause menu(ESC in game)
Screenshots






About this Mod
HotbarSlotPresets
HotbarSlotPresets is a client-side Fabric mod that works as a fallback for PvP players who used multi-keybind setups but found out those are not allowed on many servers.
Instead of multi-keybind behavior, this mod gives you a simple shortcut: pick one hotbar slot and switch between two different keys for that same slot.
Why this mod exists
A lot of PvP players have a hotbar keybind layout they're really comfortable with — but depending on the gamemode, one specific slot ends up needing a completely different key to be efficient. Things like attribute swaps, shield slots, or specific tool slots can feel way better on a side mouse button or an alternate key depending on how you play. The problem is, rebuilding your whole keybind setup every time you switch gamemode is annoying. This mod lets you keep your main layout and just swap the key for one slot whenever you need to.
How it works
- Choose one slot (1 to 9)
- Set two keys for that slot — Key A and Key B
- Use the pause menu button to toggle between A and B
- The slot stays the same — only the key changes
Credits
I (LumyNova) vibe coded this mod using Codex (GPT-5) :)
Porting
Quick note: I'd appreciate if you wanted to port this mod to other loaders and older versions! You have my permission as long as you keep the source open and give credits :)
⚠️ Important
Please use at your own risk — ask if it's allowed on the servers you wanna play with it on before using!
Banners & Icons
If you have a banner and/or icon for this mod I'd appreciate it! Reach out on Discord: YetAnotherFollowerOfChrist
Due to Problems on my original github account and me not being able to log in anymore. I will be responding issues with a account named "Lumyrix"
Jesus can save you if you repent of your sins and turn from your ways!! He went on that cross for every single human being that has lived and will live :)
Available Versions
How to Install Hotbar Slot Presets on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Hotbar Slot Presets". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+1 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Hotbar Slot Presets server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Hotbar Slot Presets compatible with fabric?
Hotbar Slot Presets officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Hotbar Slot Presets – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Hotbar Slot Presets consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Hotbar Slot Presets with just one click on your server.