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In QGIS 2.18.13 on Windows 10, I have symbolized a polygon with two layers on top of either other; the bottom layer is a solid fill color, and the top layer is a BDiagonal (hash). The two layers together produce a colored polygon with a hashed overlay in the map.

In the print composer, is there a way to combine the two legend entries that result from these two layers into a single element, such that the symbol for that polygon is shown as a single colored box with the hashing over top of it?

Right now I just have the two separate layers with their separate symbology. I need them combined.

Alternatively, maybe there is a way to produce this same symbology in a single layer on the map prior to the composer, so that this isn't an issue. I just haven't found a way to do this.

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A quick tip for legend organisation problems : I usually use memory layers and organize them as I wish.

  • Add a memory virtual layer (with no geometry)
  • Make the symbology you want
  • activate the memory layer by ticking the box
  • add to print composer

You can create completelly fake layers and add them to the legend object. Very useful when you want to have a firm grip on your legend elements and for customized legends.

Example :

  • First add your real layers :

memory fake layer

  • Then add a memory layer and use "categorized" style for example to create as many category as you like. Here, i added the 2 layers symbology and added a third one out of thin air :) Don(t care about the value column, here it's useless.

memory layer classified

  • Finally add this memory layer to your legend :

add memory layer to legend

You now master your legend !

  • Thanks for your response! I figured out a different way to approach this... – Chris Meder Jan 16 '18 at 21:50
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I figured out a simple way to do this. Just add a Layer Symbol from within the Single Symbol Layer Styling dialog.

enter image description here

This wasn't obvious before, but is exactly what I needed!

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