how to write on 3d models
Just go to the "insert" toolbar > "Annotations" > "Text" > "Text with leader"
and the click on the part on which you want to write.
Answered with a tutorial: https://grabcad.com/tutorials/how-to-write-on-3d-models
Drafting-->use 'T' text tool--> click on the space--> write ur text--> save it as .dxf format---> then open the file ---> copy the whole text by simply dragging & ctrl+c---> open sketch---> Ctrl+v--> right click on the last sketch from specification tree -->reframe on---> rightclick on the sketch--> specs-->Explode---> fix all together using fix tool--> now you can drag thr=e sketch anywhere on the plane...