README: note on snuffling

README.md

@@ -197,4 +197,8 @@ After the detection has finished have a look at the results using Pyrocko's
 ```bash
 lassie snuffle config.yaml
 ```
-Waveform data are loaded together with station meta data and detections.
+Waveform data are loaded together with station meta data and detections as
+event markers.
+Rigtht-click and select `Panels->Lassie investigate` to open a snuffling which 
+can be used to re-run the detection on the `SMAX` trace with a different 
+threshold.