remove various gcc (3.4.3) warnings such as discards qualifier all due to 'char ...

[rrdtool.git] / doc / rrdgraph.pod

diff --git a/doc/rrdgraph.pod b/doc/rrdgraph.pod
index 6017efd..c4ee169 100644 (file)
--- a/doc/rrdgraph.pod
+++ b/doc/rrdgraph.pod
@@ -68,7 +68,7 @@ this case, no other output is generated.
 
 The start and end of the time series you would like to display, and which
 B<RRA> the data should come from.  Defaults are: 1 day ago until
-now, with the best possible resolution. B<Start> and B<end> can 
+now, with the best possible resolution. B<Start> and B<end> can
 be specified in several formats, see
 L<AT-STYLE TIME SPECIFICATION|rrdfetch/> and L<rrdgraph_examples>.
 By default, B<rrdtool graph> calculates the width of one pixel in
@@ -133,9 +133,9 @@ and thus the throughput may be higher than the WAN line speed.
 
 [B<-N>|B<--no-gridfit>]
 
-In order to avoid anti-aliasing effects gridlines are placed on 
-integer pixel values. This is by default done by extending 
-the scale so that gridlines happens to be spaced using an 
+In order to avoid anti-aliasing effects gridlines are placed on
+integer pixel values. This is by default done by extending
+the scale so that gridlines happens to be spaced using an
 integer number of pixels and also start on an integer pixel value.
 This might extend the scale too much for some logarithmic scales
 and for linear scales where B<--alt-autoscale> is needed.
@@ -266,7 +266,7 @@ A green arrow is made by: C<--color ARROW:00FF00>
 
 Zoom the graphics by the given amount. The factor must be E<gt> 0
 
-[B<-n>|B<--font> I<FONTTAG>B<:>I<size>B<:>I<font>]
+[B<-n>|B<--font> I<FONTTAG>B<:>I<size>B<:>[I<font>]]
 
 This lets you customize which font to use for the various text
 elements on the RRD graphs. C<DEFAULT> sets the default value for all
@@ -275,6 +275,13 @@ for the vertical unit label, C<LEGEND> for the graph legend.
 
 Use Times for the title: C<--font TITLE:13:/usr/lib/fonts/times.ttf>
 
+If you do not give a font string you can modify just the sice of the default font:
+C<--font TITLE:13:>.
+
+If you specify the size 0 then you can modify just the font without touching
+the size. This is especially usefull for altering the default font without
+resetting the default fontsizes: C<--font DEFAULT:0:/usr/lib/fonts/times.ttf>.
+
 RRDtool comes with a preset default font. You can set the environment
 variable C<RRD_DEFAULT_FONT> if you want to change this.