To add a layer to your legend in Surfer:
- Select your legend.
- Click on the Layers tab in the Properties window.
- In the Layers in Legend section, click the Add button in the Add Layer field.
- In the Pick Layers to Add dialog, choose the layer you wish to add to the legend from the Available layers to add list.
- Click Add to close the dialog and add that layer to the legend.
Now that you have multiple layers in the legend, you can display a title for each section displaying which layer the legend pertains to (in the General section check the box next to Show layer name). You can edit the layer properties for each section by selecting the layer form the Layers to edit field in the Layers in Legend section and then editing the properties for that layer in the section below.
Updated January 25, 2017