-* COMPUTE data type for artificial data-sources calculating their
- input using RPN math and data from the other data-sources.
-
-Incompatibilities
------------------
-* Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
-
-* the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
- without functionality.
-
-Behind the Scenes
------------------
-* In order to support Holt-Winters and Calculated Datasources,
- the rrdtool data format has changed. While the new version of rrdtool can
- read files created with rrdtool 1.0.x. It is not possible to read files
- created by rrdtool-1.2.x with rrdtool-1.0.x
-
-* External libraries are not included with rrdtool anymore. This is in line
- with todays trend of using shared libraries everywhere. With the exception
- of the cgi library most things required by rrdtool will be found on every recent
- system.
+RRDgraph
+--------
+* VDEF PERCENTNAN (PRECENT that ignores NAN)
+* new --legend-direction and --legend-positon placement option