Layers for Legend Dialog
The Layers for Legend dialog controls which layers are visible in your contour layers legend.
Available Layers
The Available layers list includes any layer that is not in a legend and the layers in the selected legend. One or more layers must be selected to add a layer to the legend. Select a layer by clicking on the layer name. Select multiple layers by holding CTRL while clicking on the layer names. Select a group of layers by clicking the first layer, holding SHIFT, and clicking the last layer. The first, last, and all layers between are selected. Deselect a layer by selecting another layer, or by holding CTRL and clicking the selected layer.
Add a layer to the legend
Add layers to the legend by selecting the desired layer or layers in the Available Layers list. Next click 
to add the selected layer(s) to the Selected layers list. The added layers are added to the end of the Selected layers list.
Selected Layers
The Selected layers list includes any layer that has been selected to be in the legend
Remove a layer from the legend
Remove layers to the legend by selecting the desired layer or layers in the Selected Layers list. Next click 
to remove the selected layer(s) from the Selected layers list.
Rearranging Layers
Rearrange layers in the in the legend by selecting the desired layer or layers in the Selected Layers. Next click and drag the selected layer(s) to a new position in the list. While dragging the selection, the position to which the layers will be moved is indicated by a red line with red arrows at the ends. Release the left mouse button to move the layers.
OK and Cancel
Click OK to apply the changes to the legend. Click Cancel to close the Layers for Legend dialog without making any changes to the legend.