Add info for processTagged option

README.md

@@ -3,6 +3,13 @@
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4707041.svg)](https://doi.org/10.5281/zenodo.4707041)
 
 # radsex
+ 
+This is a modified version of radsex that can deal with reads containing tags with different size for sequenced samples.
+ 
+At this aim I added a new step processTagged that needs a popmap with a third column containing a sequence of a used tag for each individual.
+ 
+Here we suppose that the tag is still present in the reads ! 
+
 
 ## Overview