explain BoxStyleCore.Rotation in summary

bookfx · Feb 10, 2022 · a7765c8 · a7765c8
1 parent 64a087c
commit a7765c8
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/BookFx/Cores/BoxStyleCore.cs b/src/BookFx/Cores/BoxStyleCore.cs
@@ -135,6 +135,11 @@ private BoxStyleCore(
 
  /// <summary>
  /// Gets the text rotation in degrees.
+ /// Values are in the range 0 to 180. The first letter of the text is considered the center-point of the arc.
+ /// For 0 - 90, the value represents degrees above horizon.
+ /// For 91 - 180 the degrees below the horizon is calculated as:
+ /// <code>DegreesBelowHorizon = 90 - Rotation</code>
+ /// See also ECMA-376 - Office Open XML Part 1 - Fundamentals And Markup Language Reference - 18.8 Styles.
  /// </summary>
  public Option<int> Rotation { get; }