Update time.rst

topasmc · Mar 3, 2021 · 87a8cef · 87a8cef
1 parent b1cca14
commit 87a8cef
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/parameters/time.rst b/parameters/time.rst
@@ -75,14 +75,15 @@ Here is an example of a Step time feature that controls a String::
     dv:Tf/ImageName/Times = 3 10 20 30 ms
     sv:Tf/ImageName/Values = 3 "lung-1" "lung-2" "lung-3"
 
-* The first value is used for times 0 to 10 ms.
+* The first value is used for times ``Tf/TimelineStart`` to 10 ms.
+* If ``Tf/TimelineStart`` was not specified, it defaults to 0, so that first value will be used for times 0 to 10 ms.
 * The second value is used for times 10 to 20 ms.
 * The third value is used for times 20 to 30 ms.
 * After 30 ms, the value cycles back to the first value.
 
 Note that the first member of Values is not the time that the first Value should be used.
 It is the time that the first Change of value should be made.
-The first Value will be used for the time between Tf/TimelineStart and that first member of Tf/*/Times.
+The first Value will be used for the time between ``Tf/TimelineStart`` and that first member of Tf/*/Times.
 
 Note that whereas continuous functions (Linear, Sine, Cosine and Sqrt) include a ``RepetitionInterval``, Step Functions do not. They just cycle back to the first ``Value`` after the last of the ``Times`` is reached.