[Bf-docboard-svn] bf-manual: [8365] trunk/blender_docs/manual/video_editing/sequencer/strips/effects/speed_control.rst: VSE: Cleanup speed effect math

[Aaron Carlisle]

Revision: 8365
          https://developer.blender.org/rBM8365
Author:   Blendify
Date:     2021-09-06 02:41:23 +0200 (Mon, 06 Sep 2021)
Log Message:
-----------
VSE: Cleanup speed effect math

rB929d7597b345027b848c2997720e52b89c46a0ff

Modified Paths:
--------------
    trunk/blender_docs/manual/video_editing/sequencer/strips/effects/speed_control.rst

Modified: trunk/blender_docs/manual/video_editing/sequencer/strips/effects/speed_control.rst
===================================================================
--- trunk/blender_docs/manual/video_editing/sequencer/strips/effects/speed_control.rst	2021-09-04 22:03:12 UTC (rev 8364)
+++ trunk/blender_docs/manual/video_editing/sequencer/strips/effects/speed_control.rst	2021-09-06 00:41:23 UTC (rev 8365)
@@ -15,27 +15,30 @@
 Options
 =======
 
-Stretch
-   Automatically calculates the *Speed Factor* based on the length of the input strip.
-   If you scale a strip to 1/2 the original size the sequence will play back at 2 times the speed.
+Speed Control
+   The method used to adjust the speed of the strip.
 
-Multiply
-   Multiplies the current speed of the sequence by a *Factor*.
-   Thus a value of 0.5 will make the sequence half as fast while 2 would make the sequence twice as fast.
+   :Stretch:
+      Automatically calculates the speed effect based on the length of the input strip.
+      If you scale a strip to 1/2 the original size the sequence will play back at 2 times the speed.
+   :Multiply:
+      Multiplies the current speed of the sequence by a *Multiply Factor*.
+      Thus a value of 0.5 will make the sequence half as fast while 2 would make the sequence twice as fast.
+      Negative values will reverse the input while also adjusting the speed,
+      so a value of negative two will play in reverse and twice as fast as normal.
 
-   .. note::
+      .. note::
 
-      You will have to manually re-adjust the length of the strip accordingly.
+         You will have to manually re-adjust the length of the strip accordingly.
 
-Frame Number
-   Specifies a frame to remap the current frame to,
-   for example, setting this value to 50 displays the 50th frame.
-   This can then be manually :doc:`keyframed </animation/keyframes/index>` to recreate the animation.
+   :Frame Number:
+      Specifies a frame to remap the current frame to,
+      for example, setting the *Frame Number* value to 50 displays the 50th frame.
+      This can then be manually :doc:`keyframed </animation/keyframes/index>` to recreate the animation.
+   :Length:
+      Maps the frame range on a percentage scale. For example, using this and a value of 50%
+      will select the frame halfway through the sequence.
 
-Length
-   Maps the frame range on a percentage scale. For example, using this and a value of 50%
-   will select the frame halfway through the sequence.
-
 Interpolation
    Crossfades between frames to reduce screen tearing when the speed is slower than the original frame rate.