How to | Make a Legend for My Charts
The Wolfram Language provides an extensive, straightforward set of tools to control the appearance of your charts. Whether you are creating chart legends with the symbolic wrapper Legended or with the ChartLegends option, the legends you create inherit the styling chosen for your chart.
You can use ChartLegends to create legends for your charts.
The labels match the data elements:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-brsanq

To omit a data element from the legend, use None in place of its label:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-6tlrvy

Groups of data can also appear in legends:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-kdp3vc

Use ChartLabels to create repeating labels for the data elements in each group:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-vi8oie

Use LegendAppearance to change the layout of the labels within the legend, which in this case effectively changes the position of the legend:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-1bws96

Alternatively, use Placed to put the legend across the bottom of the chart:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-bcynlc

ChartLegends also works with 3D charts:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-lensvx

Any styling that you apply to your charts is reflected in the legend.
Here, images of textures from ExampleData are set up for use as pictorial bars:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-ox0za6

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-2zcz4z

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-dhcj15

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-telwdz

Create a bar chart with the textured bars. The textures also appear in the legend:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-65em8d

You can also use the symbolic wrapper Legended to create legends for your charts.
By using Legended, you can provide legend entries for specific data elements in your charts:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-nyxrnp


https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-g3cx29

Legended also works with 3D charting functions:

https://wolfram.com/xid/0bb4qttkqwprw9w41b4tifkvpemhgy8-xemwab
