Slot Cycler is great when nine hotbar slots just aren't enough for you: Now you can quickly swap a hotbar slot with the items in the same inventory column. Very useful for swapping out tools or different weapons on the fly! To see what item will come up next just look to the right of your hotbar, where a new display is added.

You can either use two keys (G and H by default) to cycle forward or backward, use the mouse wheel while holding the Alt key (configurable), or press the hotbar key of the currently selected slot again (1 to 9 in vanilla).

⏩ INSTALLATION REQUIRED ON CLIENT

⏩ REQUIRES PUZZLES LIB TO BE INSTALLED (FORGE & FABRIC)

⏩ REQUIRES FABRIC API TO BE INSTALLED (FABRIC)

⏩ REQUIRES FORGE CONFIG API PORT TO BE INSTALLED (FABRIC)

Configuration is easily possible directly from in-game using the mod menu (requires Mod Menu by Prospector to be installed on Fabric) by installing Forge Config Screens.

When it comes to manual configuration all files are found at .minecraft/config, named as MOD_ID-client.toml, MOD_ID-common.toml, or MOD_ID-server.toml depending on the type of config. Not all types might exist for this mod if any.

Note that on older mod versions server configuration files are found at .minecraft/saves/WORLD_NAME/serverconfigs, effecticely meaning they must be configured separately for each individual world.

🌟 Thanks to Areuthreateningme and their Inventory Hotswap mod, which thaught me how to swap inventory items fully client-side.