I got it. Thanks Ben.
In the full screen form of the Contact, yes, I could locate the white ribbon
on top of the form. However, there wasn't any label (called 'category' or
anything else) to this ribbon. How was I supposed to know it then ?
Secondly, in the top tool bar, there is an icon of four square color
labelles as 'Categorize'. When I clicked on it, I only had color coding
options. There wasn't any option of 'Add a new category' on the first panel.
Thirdly, as I have migrated from old Oulook with a list of Contacts, I had
all the Categories also migrated to new Outlook. However, when I clicked on
this category, there was the usual message in bracket 'Not in Master
Category'. However, there was NO OPTION of 'Add to Master Category'
available. I learned to add after a little bit of playing with the buttons
and options.
I must say that the new outlook may be rich in features, but poor in user
friendliness.
Thanks for your guidance.
Shrikant