On Spline, text behaves as a 2D object in the 3D space (like a Rectangle). Meaning it can be moved and rotated in the X, Y, and Z axes.
To create text, press the "T" icon on the Toolbar, and then click and drag on the Viewport.
You can also change the text parameters from the Text panel, like this:
Working with text in 3D is fun! Here is an example of what you can achieve with it!
👉 Next Steps
Learn how to add interactions and animations to your scenes with States and Events.