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diff --git a/doc/rrdgraph.1 b/doc/rrdgraph.1
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--- a/doc/rrdgraph.1
+++ b/doc/rrdgraph.1
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.IX Title "RRDGRAPH 1"
-.TH RRDGRAPH 1 "2008-06-29" "1.3.1" "rrdtool"
+.TH RRDGRAPH 1 "2009-05-21" "1.3.99909060808" "rrdtool"
.SH "NAME"
rrdgraph \- Round Robin Database tool grapher functions
.SH "SYNOPSIS"
.PP
When you are done fetching and processing the data, it is time to
graph it (or print it). This ends the \fBrrdtool graph\fR sequence.
+.PP
+Use \fBgraphv\fR instead of \fBgraph\fR to get detailed information about the
+graph geometry and data once it is drawn. See the bottom of the document for
+more information.
.SH "OPTIONS"
.IX Header "OPTIONS"
-.Sh "\fBgraphv\fP"
-.IX Subsection "graphv"
-This alternate version of \fBgraph\fR takes the same arguments and performs the
-same function. The \fIv\fR stands for \fIverbose\fR, which describes the output
-returned. \fBgraphv\fR will return a lot of information about the graph using
-the same format as rrdtool info (key = value). See the bottom of the document for more information.
.Sh "\fIfilename\fP"
.IX Subsection "filename"
The name and path of the graph to generate. It is recommended to
.PP
In order to avoid anti-aliasing blurring effects rrdtool snaps
points to device resolution pixels, this results in a crisper
-aperance. If this is not to your liking, you can use this switch
+appearance. If this is not to your liking, you can use this switch
to turn this behaviour off.
.PP
Gridfitting is turned off for \s-1PDF\s0, \s-1EPS\s0, \s-1SVG\s0 output by default.
-.Sh "Grid"
-.IX Subsection "Grid"
-.IP "X\-Axis" 4
-.IX Item "X-Axis"
+.Sh "X\-Axis"
+.IX Subsection "X-Axis"
[\fB\-x\fR|\fB\-\-x\-grid\fR \fI\s-1GTM\s0\fR\fB:\fR\fI\s-1GST\s0\fR\fB:\fR\fI\s-1MTM\s0\fR\fB:\fR\fI\s-1MST\s0\fR\fB:\fR\fI\s-1LTM\s0\fR\fB:\fR\fI\s-1LST\s0\fR\fB:\fR\fI\s-1LPR\s0\fR\fB:\fR\fI\s-1LFM\s0\fR]
-.Sp
+.PP
[\fB\-x\fR|\fB\-\-x\-grid\fR \fBnone\fR]
-.Sp
+.PP
The x\-axis label is quite complex to configure. If you don't have
very special needs it is probably best to rely on the autoconfiguration
to get this right. You can specify the string \f(CW\*(C`none\*(C'\fR to suppress the grid
and labels altogether.
-.Sp
+.PP
The grid is defined by specifying a certain amount of time in the \fI?TM\fR
positions. You can choose from \f(CW\*(C`SECOND\*(C'\fR, \f(CW\*(C`MINUTE\*(C'\fR, \f(CW\*(C`HOUR\*(C'\fR, \f(CW\*(C`DAY\*(C'\fR,
\&\f(CW\*(C`WEEK\*(C'\fR, \f(CW\*(C`MONTH\*(C'\fR or \f(CW\*(C`YEAR\*(C'\fR. Then you define how many of these should
placed right under the corresponding line (useful for hours, dates
etcetera). If you specify a number of seconds here the label is
centered on this interval (useful for Monday, January etcetera).
-.Sp
+.PP
.Vb 1
\& \-\-x\-grid MINUTE:10:HOUR:1:HOUR:4:0:%X
.Ve
-.Sp
+.PP
This places grid lines every 10 minutes, major grid lines every hour,
and labels every 4 hours. The labels are placed under the major grid
lines as they specify exactly that time.
-.Sp
+.PP
.Vb 1
\& \-\-x\-grid HOUR:8:DAY:1:DAY:1:86400:%A
.Ve
-.Sp
+.PP
This places grid lines every 8 hours, major grid lines and labels
each day. The labels are placed exactly between two major grid lines
as they specify the complete day and not just midnight.
-.IP "Y\-Axis" 4
-.IX Item "Y-Axis"
+.Sh "Y\-Axis"
+.IX Subsection "Y-Axis"
[\fB\-y\fR|\fB\-\-y\-grid\fR \fIgrid step\fR\fB:\fR\fIlabel factor\fR]
-.Sp
+.PP
[\fB\-y\fR|\fB\-\-y\-grid\fR \fBnone\fR]
-.Sp
+.PP
Y\-axis grid lines appear at each \fIgrid step\fR interval. Labels are
placed every \fIlabel factor\fR lines. You can specify \f(CW\*(C`\-y none\*(C'\fR to
suppress the grid and labels altogether. The default for this option is
to automatically select sensible values.
-.Sp
-If you have set \-\-y\-grid to 'none' not only the labels get supressed, also
+.PP
+If you have set \-\-y\-grid to 'none' not only the labels get suppressed, also
the space reserved for the labels is removed. You can still add space
manually if you use the \-\-units\-length command to explicitly reserve space.
-.Sp
+.PP
[\fB\-Y\fR|\fB\-\-alt\-y\-grid\fR]
-.Sp
+.PP
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).
-.Sp
+.PP
[\fB\-o\fR|\fB\-\-logarithmic\fR]
-.Sp
+.PP
Logarithmic y\-axis scaling.
-.Sp
+.PP
[\fB\-X\fR|\fB\-\-units\-exponent\fR \fIvalue\fR]
-.Sp
+.PP
This sets the 10**exponent scaling of the y\-axis values. Normally,
values will be scaled to the appropriate units (k, M, etc.). However,
you may wish to display units always in k (Kilo, 10e3) even if the data
display the y\-axis values in k (Kilo, 10e3, thousands), use \-6 to
display the y\-axis values in u (Micro, 10e\-6, millionths). Use a value
of 0 to prevent any scaling of the y\-axis values.
-.Sp
+.PP
This option is very effective at confusing the heck out of the default
rrdtool autoscaler and grid painter. If rrdtool detects that it is not
successful in labeling the graph under the given circumstances, it will switch
to the more robust \fB\-\-alt\-y\-grid\fR mode.
-.Sp
+.PP
[\fB\-L\fR|\fB\-\-units\-length\fR \fIvalue\fR]
-.Sp
+.PP
How many digits should rrdtool assume the y\-axis labels to be? You
may have to use this option to make enough space once you start
-fideling with the y\-axis labeling.
-.Sp
+fiddling with the y\-axis labeling.
+.PP
[\fB\-\-units=si\fR]
-.Sp
+.PP
With this option y\-axis values on logarithmic graphs will be scaled to
the appropriate units (k, M, etc.) instead of using exponential notation.
Note that for linear graphs, \s-1SI\s0 notation is used by default.
+.Sh "Right Y Axis"
+.IX Subsection "Right Y Axis"
+[\fB\-\-right\-axis\fR \fIscale\fR\fB:\fR\fIshift\fR]
+[\fB\-\-right\-axis\-label\fR \fIlabel\fR]
+.PP
+A second axis will be drawn to the right of the graph. It is tied to the
+left axis via the scale and shift parameters. You can also define a label
+for the right axis.
+.PP
+[\fB\-\-right\-axis\-format\fR \fIformat-string\fR]
+.PP
+By default the format of the axis lables gets determined automatically. If
+you want todo this your self, use this option with the same \f(CW%lf\fR arguments
+you know from the \s-1PRING\s0 and \s-1GPRINT\s0 commands.
+.Sh "Legend"
+.IX Subsection "Legend"
+[\fB\-g\fR|\fB\-\-no\-legend\fR]
+.PP
+Suppress generation of the legend; only render the graph.
+.PP
+[\fB\-F\fR|\fB\-\-force\-rules\-legend\fR]
+.PP
+Force the generation of \s-1HRULE\s0 and \s-1VRULE\s0 legends even if those \s-1HRULE\s0 or
+\&\s-1VRULE\s0 will not be drawn because out of graph boundaries (mimics
+behaviour of pre 1.0.42 versions).
+.PP
+[\fB\-\-legend\-position\fR=(north|south|west|east)]
+.PP
+Place the legend at the given side of the graph. The default is south.
+In west or east position it is necessary to add line breaks manually.
+.PP
+[\fB\-\-legend\-direction\fR=(topdown|bottomup)]
+.PP
+Place the legend items in the given vertical order. The default is topdown.
+Using bottomup the legend items appear in the same vertical order as a
+stack of lines or areas.
.Sh "Miscellaneous"
.IX Subsection "Miscellaneous"
[\fB\-z\fR|\fB\-\-lazy\fR]
.PP
Only generate the graph if the current graph is out of date or not existent.
-Note, that only the image size will be returned, if you run with lazy even
-when using graphv.
+Note, that all the calculations will happen regardless so that the output of
+\&\s-1PRINT\s0 and graphv will be complete regardless. Note that the behaviour of
+lazy in this regard has seen several changes over time. The only thing you
+can realy rely on before rrdtool 1.3.7 is that lazy will not generate the
+graph when it is already there and up to date, and also that it will output
+the size of the graph.
+.PP
+[\fB\-\-daemon\fR \fIaddress\fR]
+.PP
+Address of the rrdcached daemon. If specified, a \f(CW\*(C`flush\*(C'\fR command is sent
+to the server before reading the \s-1RRD\s0 files. This allows the graph to contain
+fresh data even if the daemon is configured to cache values for a long time.
+For a list of accepted formats, see the \fB\-l\fR option in the rrdcached manual.
+.PP
+.Vb 1
+\& rrdtool graph [...] \-\-daemon unix:/var/run/rrdcached.sock [...]
+.Ve
.PP
[\fB\-f\fR|\fB\-\-imginfo\fR \fIprintfstr\fR]
.PP
would look like this:
.PP
.Vb 1
-\& \-\-imginfo \(aq<IMG SRC="/img/%s" WIDTH="%lu" HEIGHT="%lu" ALT="Demo">\(aq
+\& \-\-imginfo '<IMG SRC="/img/%s" WIDTH="%lu" HEIGHT="%lu" ALT="Demo">'
.Ve
.PP
[\fB\-c\fR|\fB\-\-color\fR \fI\s-1COLORTAG\s0\fR#\fIrrggbb\fR[\fIaa\fR]]
the actual graph, \f(CW\*(C`SHADEA\*(C'\fR for the left and top border, \f(CW\*(C`SHADEB\*(C'\fR for the
right and bottom border, \f(CW\*(C`GRID\*(C'\fR, \f(CW\*(C`MGRID\*(C'\fR for the major grid, \f(CW\*(C`FONT\*(C'\fR for
the color of the font, \f(CW\*(C`AXIS\*(C'\fR for the axis of the graph, \f(CW\*(C`FRAME\*(C'\fR for the
-line around the color spots and finally \f(CW\*(C`ARROW\*(C'\fR for the arrow head pointing
+line around the color spots, and finally \f(CW\*(C`ARROW\*(C'\fR 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, \s-1FF\s0 is maximum) of red, green
and blue. Optionally you may add another hexadecimal number specifying the
.PP
[\fB\-n\fR|\fB\-\-font\fR \fI\s-1FONTTAG\s0\fR\fB:\fR\fIsize\fR\fB:\fR[\fIfont\fR]]
.PP
-This lets you customize which font to use for the various text
-elements on the \s-1RRD\s0 graphs. \f(CW\*(C`DEFAULT\*(C'\fR sets the default value for all
-elements, \f(CW\*(C`TITLE\*(C'\fR for the title, \f(CW\*(C`AXIS\*(C'\fR for the axis labels, \f(CW\*(C`UNIT\*(C'\fR
-for the vertical unit label, \f(CW\*(C`LEGEND\*(C'\fR for the graph legend.
+This lets you customize which font to use for the various text elements on
+the \s-1RRD\s0 graphs. \f(CW\*(C`DEFAULT\*(C'\fR sets the default value for all elements, \f(CW\*(C`TITLE\*(C'\fR
+for the title, \f(CW\*(C`AXIS\*(C'\fR for the axis labels, \f(CW\*(C`UNIT\*(C'\fR for the vertical unit
+label, \f(CW\*(C`LEGEND\*(C'\fR for the graph legend, \f(CW\*(C`WATERMARK\*(C'\fR for the watermark on the
+edge of the graph.
.PP
Use Times for the title: \f(CW\*(C`\-\-font TITLE:13:Times\*(C'\fR
.PP
-If you do not give a font string you can modify just the sice of the default font:
+If you do not give a font string you can modify just the size of the default font:
\&\f(CW\*(C`\-\-font TITLE:13:\*(C'\fR.
.PP
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
+the size. This is especially useful for altering the default font without
resetting the default fontsizes: \f(CW\*(C`\-\-font DEFAULT:0:Courier\*(C'\fR.
.PP
RRDtool comes with a preset default font. You can set the environment
.PP
If images are interlaced they become visible on browsers more quickly.
.PP
-[\fB\-g\fR|\fB\-\-no\-legend\fR]
-.PP
-Suppress generation of the legend; only render the graph.
-.PP
-[\fB\-F\fR|\fB\-\-force\-rules\-legend\fR]
-.PP
-Force the generation of \s-1HRULE\s0 and \s-1VRULE\s0 legends even if those \s-1HRULE\s0 or
-\&\s-1VRULE\s0 will not be drawn because out of graph boundaries (mimics
-behaviour of pre 1.0.42 versions).
-.PP
[\fB\-T\fR|\fB\-\-tabwidth\fR \fIvalue\fR]
.PP
By default the tab-width is 40 pixels, use this option to change it.
.PP
[\fB\-W\fR|\fB\-\-watermark\fR \fIstring\fR]
.PP
-Adds the given string as a watermark, horizontally centred, at the bottom
+Adds the given string as a watermark, horizontally centered, at the bottom
of the graph.
.Sh "Data and variables"
.IX Subsection "Data and variables"
You need at least one \fB\s-1DEF\s0\fR statement to generate anything. The
other statements are useful but optional.
See rrdgraph_data and rrdgraph_rpn for the exact format.
-.Sh "Graph and print elements"
-.IX Subsection "Graph and print elements"
+.PP
+\&\s-1NOTE:\s0 \fBGraph and print elements\fR
+.PP
You need at least one graph element to generate an image and/or
at least one print statement to generate a report.
See rrdgraph_graph for the exact format.
.IX Subsection "graphv"
Calling rrdtool with the graphv option will return information in the
rrdtool info format. On the command line this means that all output will be
-in key=value format. When used from the perl and ruby bindings a hash
+in key=value format. When used from the Perl and Ruby bindings a hash
pointer will be returned from the call.
.PP
When the filename '\-' is given, the contents of the graph itself will also
be returned through this interface (hash key 'image'). On the command line
the output will look like this:
.PP
-.Vb 12
+.Vb 14
\& print[0] = "0.020833"
\& print[1] = "0.0440833"
\& graph_left = 51
\& graph_top = 22
\& graph_width = 400
\& graph_height = 100
+\& graph_start = 1232908800
+\& graph_end = 1232914200
\& image_width = 481
\& image_height = 154
\& value_min = 0.0000000000e+00
There is more information returned than in the standard interface.
Especially the 'graph_*' keys are new. They help applications that want to
know what is where on the graph.
+.SH "ENVIRONMENT VARIABLES"
+.IX Header "ENVIRONMENT VARIABLES"
+The following environment variables may be used to change the behavior of
+\&\f(CW\*(C`rrdtool\ graph\*(C'\fR:
+.IP "\fB\s-1RRDCACHED_ADDRESS\s0\fR" 4
+.IX Item "RRDCACHED_ADDRESS"
+If this environment variable is set it will have the same effect as specifying
+the \f(CW\*(C`\-\-daemon\*(C'\fR option on the command line. If both are present, the command
+line argument takes precedence.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
rrdgraph gives an overview of how \fBrrdtool graph\fR works.
.IX Header "AUTHOR"
Program by Tobias Oetiker <tobi@oetiker.ch>
.PP
-This manual page by Alex van den Bogaerdt <alex@ergens.op.het.net>
+This manual page by Alex van den Bogaerdt <alex@vandenbogaerdt.nl>
+with corrections and/or additions by several people