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<H3><A NAME="8_1_10">8.1.10 Adjusting the grid lines in the plot</A></H3>
<P> By default only the Y-axis have grid lines and then only on major
 ticks, i.e. ticks which have a label. It is of course possible to
 change this. Both the X , Y and Y2 can have grid lines. It is also
 possible to let the gridlines also be drawn on the minor tick marks,
 i.e. ticks without a label. Lets see how we can apply this to the graph
 above.</P>
<P> The grid is modified by accessing the xgrid (or ygrid) component of
 the graph. So to display minor grid lines for the Y graph we make the
 call<DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
&nbsp;$graph</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">ygrid</FONT><FONT
color="#007700">-&gt;</FONT><FONT color="#0000BB">Show</FONT><FONT color="#007700">
(</FONT><FONT color="#0000BB">true</FONT><FONT color="#007700">,</FONT><FONT
color="#0000BB">true</FONT><FONT color="#007700">)</FONT><FONT color="#0000BB">
</FONT></FONT></CODE></DIV></P>
<P> The first parameter determines if the grid should be displayed at
 all and the second parameter determines whether or not the minor grid
 lines should be displayed.</P>
<P> If you also wanted the grid lines to be displayed for the Y2 axis
 you would call<DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
&nbsp;$graph</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">
y2grid</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">Show</FONT><FONT
color="#007700">(</FONT><FONT color="#0000BB">true</FONT><FONT color="#007700">
,</FONT><FONT color="#0000BB">true</FONT><FONT color="#007700">)</FONT><FONT
color="#0000BB"></FONT></FONT></CODE></DIV></P>
<P><STRONG> Note.</STRONG> In general it is not a good idea to display
 both the Y and Y2 grid lines since the resulting image becomes
 difficult to read for a viewer.</P>
<P> We can also enable the X-grid lines with the call<DIV class="phpscript">
<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$graph</FONT><FONT color="#007700">
-&gt;</FONT><FONT color="#0000BB">xgrid</FONT><FONT color="#007700">-&gt;</FONT><FONT
color="#0000BB">Show</FONT><FONT color="#007700">(</FONT><FONT color="#0000BB">
true</FONT><FONT color="#007700">)</FONT><FONT color="#0000BB"></FONT></FONT>
</CODE></DIV></P>
<P></P>
<P> In the above line we will of course only just enable the major grid
 lines.</P>
<P> To bring all this together we will display a graph with grid lines
 for both Y and X axis enabled.<DIV class="example">
<BR> <A href="exframes/frame_example8.html" target="blank"><IMG border="0"
HEIGHT="200"  src="img/example8.png" WIDTH="350"></A>
<BR><B>Figure 18:</B> Enabling major and minor gridlines for Y-axis and
 major grid lines for the X-axis <A href="exframes/frame_example8.html" target="blank">
[src]</A>&nbsp;
<P></P>
</DIV></P>
<P><DIV class="note"><B>Note:</B> If you think the first value of the
 Y-axis is to close to the first label of the X-axis you have the option
 of either increasing the margin (with a call to <A href="../ref/Axis.html#_AXIS_SETLABELMARGIN">
 SetLabelMargin()</A> ) or to hide the first label (with a call to <A href="../ref/Axis.html#_AXIS_HIDEFIRSTTICKLABEL">
 HideFirstTickLabel()</A> )</DIV></P>
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