title: multiple legends in excel chart
body: <p>Is there a way in Excel to have 2 legends for a single chart? 
  I have an excel chart with many series. Let's take the following structure.</p>
  
  <pre><code>X   AY1 AY2 BY1 BY2 CY1 CY2
  1   2   3   4   5   6   7
  3   11  2   5   23  45  65
  </code></pre>
  
  <p>X column represents the horizontal scale the rest of the columns represent the vertical scales. A, B and C are something like a category, and Y1 and Y2 are series for each category. Now, Y1 and Y2 have the same line style, no matter what category, but the category gives the color.
  So in this example Y1 is dashed and Y2 is dotted. A is blue, B is red and C is green. This leads to: </p>
  
  <pre><code>AY1 - blue dashed, AY2 - blue dotted, 
  BY1 - red dashed,  BY2 - red dotted,
  CY1 - green dashed,CY2 - green dotted.
  </code></pre>
  
  <p>Currently my legend is AY1, AY2 and so on, with the dash style and color.
  Because I can have more than 10 categories with more than 2 series for each of them, I will end up with a legend of no. of categories * no. of series, which is not necessary.
  Instead I would like a legend like: Y1 - dashed, Y2 - dotted(each series line type only once) and then a legend with the color for each category( A- red, B - blue, C - green).</p>
  
  <p>Is this possible in Excel?</p>
  
  <p>Thanks!</p>