Hi I Gusti Made Ari Permadi,
Many thanks for your reply.
I had tried the method that you propose but it doesn't seem to work on NAV 2018.
I created the AL file as advice but encounter an error.

"Expected one of the application object keywords (table, tableextension, page, pageextension, pagecustomization, profile, codeunit, report, xmlport, query, controladdin)"
I'm currently on NAV 2018 with AL Language 0.13.91787.
Seek your kind advise.