Final answer:
The back button error in a PDF viewer means that a user is unable to navigate back to a previous view after clicking links, which can be overcome by mastering navigation shortcuts of the viewing platform.
Step-by-step explanation:
Getting the back button error usually refers to a scenario where the user is unable to return to a previously viewed page or section after navigating away from it. In the context of a PDF viewer, it means that after clicking on a link within the document, the user is struggling to return to the original point. This can be particularly frustrating if the starting point is many pages away from the linked content.
Learning the navigation shortcuts of your PDF viewing platform, like Adobe Acrobat or Mac Preview, can solve this problem. For example, Adobe Acrobat uses the cursor/arrow keys ← and X for back and forward navigation, respectively, while Mac Preview utilizes H-[ and H-] for the same functions. Additionally, some mouses, especially gaming ones, have buttons configured to assist with navigating back and forward.
Knowing these shortcuts will make using digital books or documents more efficient, granting you the ability to quickly switch between different sections without losing your place. Thus, mastering these navigational tools is highly recommended to enhance your reading experience.