Figure 2.16. Breadcrumbs on Google Docs help pages.
Figure 2.17. A mock-up we created showing how sideways navigation via breadcrumbs could work on Google Help.
Sideways navigation is one thing that conventional breadcrumbs do not offer. The user can go up one level to the parent category, but not sideways to siblings of the current category. This could be easily implemented with a pop-out or similar element, as mocked up above.
Inline navigation constitutes all ...