diff --git a/DataGuide_AAPF_HSI.md b/DataGuide_AAPF_HSI.md
index 9be7bec..e75f479 100644
--- a/DataGuide_AAPF_HSI.md
+++ b/DataGuide_AAPF_HSI.md
@@ -67,9 +67,15 @@ This document details the file system organization and navigation procedures for
 
 
 
+### How to Read Animated GIF Files Containing VNIR-SWIR Coregistration Quality Info
 
 
 
+### How to Read Information in Header Summary (header_summary_plants.csv, header_summary_ref.csv)
+
+
+### How to Read Information in Spreadsheet file (.xlsx, masterfile)
+