diff --git a/docs/usage.md b/docs/usage.md
index 2412e3cbe..42701728d 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -345,7 +345,7 @@ The following custom field types are supported:
 - `Integer`: integer number e.g. 12
 - `Number`: float number e.g. 12.3456
 - `Monetary`: float number with exactly two decimals, e.g. 12.30
-- `Document Link`: reference(s) to other document(s), displayed as links
+- `Document Link`: reference(s) to other document(s) displayed as links, automatically creates a symmetrical link in reverse
 
 ## Share Links