What is the correct method for showing previous panels while Onion Skinning?

The correct method for showing previous panels while Onion Skinning is by toggling the previous icon on. This action specifically engages the feature that allows you to see the frames or panels that come before the current one, which is essential for animators and storyboard artists to visualize the continuity and flow of their work. By activating this option, users can effectively analyze movement and transitions between their drawings or panels, ensuring that they maintain consistency throughout their project.

The other methods listed do not directly address the function of showing previous panels. While using a specific keyboard shortcut may help in certain situations, it does not specifically pertain to the action of enabling previous frames in Onion Skinning. Adjusting Onion Skin settings could relate to changing opacity or the number of frames viewed; however, it doesn't explicitly toggle the visibility of previous panels. Similarly, applying a filter in the view menu is unrelated to the Onion Skinning functionality, as it pertains more to the overall display of content rather than the specific interactive frame analysis needed for effective storytelling in animation or storyboard work.