org-manual.org: document org-plot changes

* doc/org-manual.org: Document changes to org-plot.el.

doc/org-manual.org

@@ -2842,6 +2842,19 @@ following table.
 | Morelia   |    257.56 |   17.67 |
 #+end_example
 
+Org Plot supports a range of plot types, and provides the ability to add more.
+For example, a radar plot can be generated like so:
+#+begin_example
+,#+PLOT: title:"An evaluation of plaintext document formats" transpose:yes type:radar min:0 max:4
+| Format            | Fine-grained-control | Initial Effort | Syntax simplicity | Editor Support | Integrations | Ease-of-referencing | Versatility |
+|-------------------+----------------------+----------------+-------------------+----------------+--------------+---------------------+-------------|
+| Word              |                    2 |              4 |                 4 |              2 |            3 |                   2 |           2 |
+| LaTeX             |                    4 |              1 |                 1 |              3 |            2 |                   4 |           3 |
+| Org Mode          |                    4 |              2 |               3.5 |              1 |            4 |                   4 |           4 |
+| Markdown          |                    1 |              3 |                 3 |              4 |            3 |                   3 |           1 |
+| Markdown + Pandoc |                  2.5 |            2.5 |               2.5 |              3 |            3 |                   3 |           2 |
+#+end_example
+
 Notice that Org Plot is smart enough to apply the table's headers as
 labels.  Further control over the labels, type, content, and
 appearance of plots can be exercised through the =PLOT= keyword
@@ -2872,9 +2885,15 @@ For more information and examples see the [[https://orgmode.org/worg/org-tutoria
   the third and fourth columns.  Defaults to graphing all other
   columns aside from the =ind= column.
 
+- transpose ::
+
+  When =y=, =yes=, or =t= attempt to transpose the table data before plotting. Also
+  recognises the shorthand option =trans=.
+
 - =type= ::
 
-  Specify whether the plot is =2d=, =3d=, or =grid=.
+  Specify the type of the plot, by default one of =2d=, =3d=, =radar=, or =grid=.
+  Available types can be customised with ~org-plot/preset-plot-types~.
 
 - =with= ::
 
@@ -2901,6 +2920,24 @@ For more information and examples see the [[https://orgmode.org/worg/org-tutoria
   When plotting =3d= or =grid= types, set this to =t= to graph a flat
   mapping rather than a =3d= slope.
 
+- min ::
+
+  Provides a minimum axis value that may be used by a plot type. Implicitly
+  assumes the =y= axis is being referred to. Can explicitly provide a value for a
+  either the =x= or =y= axis with =xmin= and =ymin=.
+
+- max ::
+
+  Provides a maximum axis value that may be used by a plot type. Implicitly
+  assumes the =y= axis is being referred to. Can explicitly provide a value for a
+  either the =x= or =y= axis with =xmax= and =ymax=.
+
+- ticks ::
+
+  Provides a desired number of axis ticks to display, that may be used by a plot
+  type. If none is given a plot type that requires ticks will use
+ ~org--plot/sensible-tick-num~ to try to determine a good value.
+
 - =timefmt= ::
 
   Specify format of Org mode timestamps as they will be parsed by