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)

by
203 Downloads
fabricgame-mechanicsutility
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Screenshots

Hotbar Slot Presets Screenshot 1
Hotbar Slot Presets Screenshot 2
Hotbar Slot Presets Screenshot 3
Hotbar Slot Presets Screenshot 4
Hotbar Slot Presets Screenshot 5
Hotbar Slot Presets Screenshot 6

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

  1. Choose one slot (1 to 9)
  2. Set two keys for that slot — Key A and Key B
  3. Use the pause menu button to toggle between A and B
  4. 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

Hotbar Slot Presets 1.0.1release
MC 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric
March 23, 2026
Hotbar Slot Presets 1.0.0release
MC 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric
February 28, 2026

How to Install Hotbar Slot Presets on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

3

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

fabric

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+1 more)

Server-side

Unsupported

Recommended 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.

Rent Modded Server

Install Hotbar Slot Presets with just one click on your server.

Recommended RAM
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Min. 3 GB | +1 GB pro 8 Spieler
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Details

License
LicenseRef-LumyNova-Source-Use-License-LSUL-1.0
Server-side
Unsupported

Supported Versions

1.21.111.21.101.21.91.21.8