Simple:
* I annotated the text with important notes and definitions.
* The professor asked us to annotate the poem with our interpretations.
More complex:
* The researcher carefully annotated the historical documents, adding context and explanations for future reference.
* Annotating the code with comments helps other developers understand its logic.
* The artist annotated the painting with details about the colors and techniques used.
Figurative:
* Life is like a blank canvas, waiting to be annotated with our experiences and memories.
These examples show how "annotate" can be used in different contexts. It can be used to describe the process of adding notes to a text, code, image, or even a person's life.