Improve subsection nesting; add detail to image search

[gpdf]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.07%. Comparing base (5f8eb9d) to head (82cab62).
⚠️ Report is 92 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3351      +/-   ##
==========================================
- Coverage   70.08%   70.07%   -0.02%     
==========================================
  Files         232      232              
  Lines       19890    19893       +3     
==========================================
  Hits        13940    13940              
- Misses       5950     5953       +3     

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[bsipocz]

Thanks!