Best Practice to set custom default values in Forms.

extension/Documentation/Manual.rst

@@ -3533,6 +3533,13 @@ already a lock for a `tablename` / `record id` pair, the most restrictive will b
 Best practice
 -------------
 
+Custom default value only for 'new records'
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+In the specific `FormElement` set `value={{columnName:RSE}}`. The link to the form should be rendered with
+'"...&columnName=<data>&..." AS _page'. The trick is that the STORE_RECORD is empty for new records, and therefore the
+ corresponding value from STORE_SIP will be returned. Existing records will use the already saved value.
+
 Central configured values
 ^^^^^^^^^^^^^^^^^^^^^^^^^