diff --git a/config/config.yaml b/config/config.yaml
index 848cb4e3276648a3c43583d85f3e00177f4e63c9..d79f3edef346949e31c223832d689c5af2d79174 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -200,7 +200,8 @@ macs2:
 #
 # - do: if unchecked, this rule is ignored.
 # - threshold: could be 'stringent' of 'relaxed'
-# - norm: specify "norm" for normalized or "non" for non-normalized data processing
+# - norm: specify "norm" for normalized or "non" for non-normalized data processing.
+#         if design:spike is set to yes, specify "non" according to SEACR manual
 #===============================================================================