To facilitate the usage of software architecture documents (ADs), we claim the architectural information in the ADs needs to be structured into or presented as chunks. A chunk allows related information to be retrieved collectively as a unit and simplifies information location tasks. We propose a new semi-automated approach based on the actual usage of ADs by previous users, i.e. by capturing users' exploration paths through ADs while engaging in information seeking tasks and making these paths available for future retracing and analysis. As part of our work, we developed KaitoroCap, a document navigation capture and visualisation tool. Its main features are exploration paths capture, retrieval, analysis, hierarchical tree-view visualization of paths, path searching, section rating, tagging, commenting, expanding/collapsing and page model generation to enable dynamic restructuring of ADs. This paper describes the design, implementation and usage examples of KaitoroCap.