les.ref 
0108     vref = <span class="string">'dfs'</span>;
0109     disp(<span class="string">'Reference is set to DFS'</span>)
0110     <span class="keyword">if</span> handles.DFSfull
0111         drange = [];
0112         disp(<span class="string">'DFS Range set to Full Depth'</span> )
0113     <span class="keyword">else</span>
0114         <span class="keyword">if</span> handles.units 
0115             drange = [handles.dfslow handles.dfshi];
0116             disp([<span class="string">'DFS Range = '</s