Thanks for prompt reply.
This is what I need. Please note that in the mail the string came as
"lengthMenu": [ 10, 25, 50 ]
which I copied into the custom command field. This removed the pagination drop box altogether.
Checked the support page, and realised that there it shows
“lengthMenu”: [ 10, 25, 50 ]
So now it works perfectly.
Thanks again.
IR