How to add raised text to an imported STL file for 3D printing I'm new to modeling and 3D printing and have a long way to go... but 1 of the reasons I got a 3D printer was practical/functional use at my family farm.  What really caught my eye was the ability to print cattle ear tags.  I found a design
https://www.thingiverse.com/thing:2950135
and all I have to do is edit and update the name and number on it, but struggling with that part. From the online help, I thought it was under
Mode
Edit Mode.
Menu
3D Viewport ‣ Text
but I can't find the 3D Viewport - Text part.
Can someone help give me a little nudge on this, please?
Thanks
Jim
When importing STL change Scale to 0.001 to get proper size ... right now your Cattle has a dimension 73 x 99 m.

Now add a Text object ...

... that becomes big by default so scale S it down

WIth Tab switch to edit mode type your text. Add Solidify modifier to get thickness of letters.

Search for Convert to Mesh, hide this object in Outliner Editor. Select Cattle object add Boolean modifier kind Union and as Object select your Text object.

Before export use again Convert to Mesh (or apply modifier under arrow down icon) to make manifold object. ready for 3D printer.

I would suggest to you check some tutorial for beginners to get friendly with blenders UI first.