diff --git a/contrib/customize_cardset.asciidoc b/contrib/customize_cardset.asciidoc
index 4b9683c7..052f4951 100644
--- a/contrib/customize_cardset.asciidoc
+++ b/contrib/customize_cardset.asciidoc
@@ -19,7 +19,7 @@ back01.ext;back02.ext;back03.ext
 Line 1
 ------
 
-*$A:* The number of fields in first line (e.g. `.gif;1;78;8,1016` -> `$A=4`)
+*$A:* The cardset version number that belongs to the number of fields divided through ";" on the first line (e.g. `.gif;1;78;8,1016` -> `$A=4`)
 
 ( *WARNING:* For Mahjongg, $A must always be 6 and $F must be set; $F could also be defined to 0 at your convenience )
 
@@ -156,6 +156,9 @@ You are welcome to send any suggestions to: mailto:neelix570@gmail.com[the Autho
 https://github.com/shlomif/PySolFC/issues[PySol FC's GitHub issue tracker] or
 https://sourceforge.net/p/pysolfc/_list/tickets[PySol FC's Sourceforge issue tracker].
 
+*NOTE 2:*
+It is a second file called `COPYRIGHT`, containing the text that can be accessed via `Info/Settings`.
+
 License:
 ~~~~~~~~