Make the symbols in a classed post legend the same size as on the map in Surfer

1. Select the Legend in the Object Manager.
2. In the Properties window, click the Layers tab.
3. If your legend includes information for more than one layer, select the Classed Post layer in the Layer to edit list. 
4. In the Classed Post Layer section, change the Symbol size method to Same as plot. The symbols in the legend will update to be the same size as those in the plot.

Updated October 14, 2021