What is the primary focus of using printed materials in training?

The primary focus of using printed materials in training is to guide learning and facilitate note-taking. Printed materials serve as structured resources that present information in an organized manner, allowing learners to follow along with the content being taught and to make annotations that reinforce their understanding. This method of engaging with printed materials helps learners to retain information better and provides a reference for future study or application of the concepts.

Utilizing printed materials also supports a range of learning styles, as they can offer clear visuals, charts, and diagrams that complement verbal instruction. This combination enhances comprehension and allows for effective information absorption, which is essential in a training environment.

The other options do not capture this primary focus effectively. Visual entertainment, while it may play a role in engagement, does not contribute to the educational goals as strongly as guiding learning does. Increasing technical complexities can overwhelm learners and detracts from the clarity that printed materials should provide. Serving as a primary source of evidence is a more narrow function typically associated with documentation or legal contexts, rather than the broader educational objectives that printed materials serve in training.