Improve FTS documentation

[vitusortner]

No description provided.

[codecov]

Codecov Report

Merging #484 (015f205) into develop (362625d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #484   +/-   ##
========================================
  Coverage    83.63%   83.63%           
========================================
  Files           69       69           
  Lines         1741     1741           
========================================
  Hits          1456     1456           
  Misses         285      285           

Flag	Coverage Δ
floor	83.63% <ø> (ø)
floor_generator	83.56% <ø> (ø)

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