diff --git a/ADApp/Db/roi_sync.template b/ADApp/Db/roi_sync.template
index 49303c9..ddaa353 100644
--- a/ADApp/Db/roi_sync.template
+++ b/ADApp/Db/roi_sync.template
@@ -1,3 +1,5 @@
+#
+# This database syncs an ROI to be the size of the entire detector
 record(longout, "$(P)$(ROI)SizeXLink")
 {
     field(DOL,  "$(P)$(CAM)ArraySizeX_RBV CP MS")