Frequently Asked Questions
How do I configure the tweaks?
If you are on Forge, you should install a mod such as Configured to bring back the mod config screen from earlier Minecraft versions.
On Fabric, you can find the mod settings in the Mod Menu (assuming you have a mod menu mod installed).
Either way you always have the option to edit the config files directly using a text editor.
See also the general frequently asked questions if your question is not listed here.