diff --git a/ess/TraceWin.py b/ess/TraceWin.py
index a30469417cddd215f35443c5dca5f22d34fb6895..4a62fdf813f5bcec9ee331102c59e8409eca5343 100644
--- a/ess/TraceWin.py
+++ b/ess/TraceWin.py
@@ -169,10 +169,10 @@ class dst:
         plt.title('{} [{}] - {} [{}]'.format(x,units[x],y,units[y]))
         hist,bin_edges=np.histogram(dx,bins=nb)
         b=bin_edges[:-1]+0.5*(bin_edges[1]-bin_edges[0])
-        plt.plot(b,hist*0.2*(max(dy)-min(dy))/max(hist)+min(dy),'k',drawstyle='steps')
+        plt.plot(b,hist*0.2*(max(dy)-min(dy))/max(hist)+min(dy),'k',lw=1.5,drawstyle='steps')
         hist,bin_edges=np.histogram(dy,bins=nb)
         b=bin_edges[:-1]+0.0*(bin_edges[1]-bin_edges[0])
-        plt.plot(hist*0.2*(max(dx)-min(dx))/max(hist)+min(dx),b,'k',drawstyle='steps')
+        plt.plot(hist*0.2*(max(dx)-min(dx))/max(hist)+min(dx),b,'k',lw=1.5,drawstyle='steps')
 
 class plt:
     '''