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
[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.
[B<-Y>|B<--alt-y-grid>]
-Place the Y grid dynamically based on the graph's Y range. The
-algorithm ensures that you always have a grid, that there are enough
-but not too many grid lines, and that the grid is metric. That is the
-grid lines are placed every 1, 2, 5 or 10 units. (contributed by
-Sasha Mikheev)
+Place the Y grid dynamically based on the graph's Y range. The algorithm
+ensures that you always have a grid, that there are enough but not too many
+grid lines, and that the grid is metric. That is the grid lines are placed
+every 1, 2, 5 or 10 units. This parameter will also ensure that you get
+enough decimals displayed even if your graph goes from 69.998 to 70.001.
+(contributed by Sasha Mikheev).
[B<-o>|B<--logarithmic>]
I<COLORTAG> is one of C<BACK> background, C<CANVAS> for the background of
the actual graph, C<SHADEA> for the left and top border, C<SHADEB> for the
right and bottom border, C<GRID>, C<MGRID> for the major grid, C<FONT> for
-the color of the font, C<AXIS> for the axis of the graph and finally C<ARROW>
-for the arrow head pointing to the future. Each color is composed out of
-three hexadecimal numbers specifying its rgb color component (00 is off, FF is
-maximum) of red, green and blue. Optionally you may add another hexadecimal
-number specifying the transparency (FF is solid). You may set this option
-several times to alter multiple defaults.
+the color of the font, C<AXIS> for the axis of the graph, C<FRAME> for the
+line around the color spots and finally C<ARROW> for the arrow head pointing
+up and forward. Each color is composed out of three hexadecimal numbers
+specifying its rgb color component (00 is off, FF is maximum) of red, green
+and blue. Optionally you may add another hexadecimal number specifying the
+transparency (FF is solid). You may set this option several times to alter
+multiple defaults.
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
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.
projects / rrdtool.git / blobdiff