diff --git a/Live-previews.md b/Live-previews.md
index 30ab220..947423e 100644
--- a/Live-previews.md
+++ b/Live-previews.md
@@ -123,9 +123,9 @@ nnn-preview ()
     fi
 
     # The default behaviour is to cd on quit (nnn checks if NNN_TMPFILE is set)
-    # To cd on quit only on ^G, remove the "export" as in:
+    # If NNN_TMPFILE is set to a custom path, it must be exported for nnn to see.
+    # To cd on quit only on ^G, remove the "export" and set NNN_TMPFILE *exactly* as this:
     #     NNN_TMPFILE="${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.lastd"
-    # NOTE: NNN_TMPFILE is fixed, should not be modified
     export NNN_TMPFILE="${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.lastd"
 
     # This will create a fifo where all nnn selections will be written to