diff --git a/PTL1/Transcriptomes/Scripts/1a_TranscriptLengthFilter.py b/PTL1/Transcriptomes/Scripts/1a_TranscriptLengthFilter.py
index 86f3464..4fa8fc4 100644
--- a/PTL1/Transcriptomes/Scripts/1a_TranscriptLengthFilter.py
+++ b/PTL1/Transcriptomes/Scripts/1a_TranscriptLengthFilter.py
@@ -1,7 +1,8 @@
 # Last updated 01/04/2023
 
 # This script is intended to remove transcripts below or above a given   		 			 
-# size range from a transcriptome assembly.
+# size range from a transcriptome assembly. It should be run as part
+# of Part 1 of the PhyloToL version 6 pipeline, using the script wrapper.sh.
 
 # Prior to running this script, ensure that you have assembled your
 # transcriptome and renamed the assembled transcripts in the format of