diff --git a/Concepts.md b/Concepts.md
index 4f54b91..80a2c49 100644
--- a/Concepts.md
+++ b/Concepts.md
@@ -243,6 +243,8 @@ The following special variables can be accessed from the command prompt or a spa
 | `$dn` | Path open in context n [n=1/2/3/4] |
 | `$fn` | File path hovered in context n [n=1/2/3/4] |
 
+E.g. to copy the hovered file in context 1 to the directory open in context 3, run `cp "$f1" "$d3"`.
+
 ## Design
 
 `nnn` (the core C utility) is, generally speaking, _feature-restricted_. It includes features which you _really_ need so it can remain light enough to finish your workflow accurately before your train of thought is lost.