Multi Line Action Bar
This is a simple client-side mod that adds support for multi-line text for action bar. This text will be centered relative to the Vanilla's text offset.
Use \n for new line, like this:
/title @s actionbar {"text":"Line1\nLine2"}
Without mod

With mod

How to Install Multi Line Action Bar (Mod)
Multi Line Action Bar by diskria is verified for Fabric across Minecraft versions 1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3 (latest release: 1.0, file size: 7 KB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3) and platform (Fabric).
- Make sure you have the compatible loader or environment installed for Fabric.
- Move the downloaded Multi Line Action Bar file into your Minecraft
.minecraft/modsfolder and launch the game.