Simple:
* The professor added helpful annotations to the student's essay.
* The book's annotations provided insightful commentary on the text.
More complex:
* The digital annotation tool allowed users to highlight and comment on specific passages of the document.
* Through meticulous annotation, researchers were able to identify the patterns in the historical data.
* The artist's annotations in the margins of the sketchbook gave a fascinating glimpse into their creative process.
In different contexts:
* Academic: The student's annotated bibliography was comprehensive and well-organized.
* Literary: The poet's use of annotation helped to create a multi-layered and engaging reading experience.
* Scientific: The scientist's annotations on the lab notes were essential for replicating the experiment.
The key is to use "annotation" in a way that clarifies the specific act of adding notes or explanatory remarks to a text or document.