doc, #262

phetsims · Mar 11, 2023 · 6645c1c · 6645c1c
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diff --git a/js/common/model/AreaUnderCurveScrubber.ts b/js/common/model/AreaUnderCurveScrubber.ts
@@ -1,7 +1,8 @@
 // Copyright 2023, University of Colorado Boulder
 
 /**
- * AreaUnderCurveScrubber is the model element for the area-under-curve scrubber.
+ * AreaUnderCurveScrubber is the model element for the area-under-curve scrubber. It can be moved horizontally,
+ * and the accumulated area (or 'net signed area') is the area between x=0 and the scrubber's x position.
  *
  * @author Chris Malley (PixelZoom, Inc.)
  */

diff --git a/js/common/model/TangentScrubber.ts b/js/common/model/TangentScrubber.ts
@@ -1,7 +1,8 @@
 // Copyright 2023, University of Colorado Boulder
 
 /**
- * TangentScrubber is the model element for the tangent scrubber.
+ * TangentScrubber is the model element for the tangent scrubber. It can be moved horizontally to position the
+ * tangent line on the original curve.
  *
  * @author Chris Malley (PixelZoom, Inc.)
  */