Adding Comment in KDT UI and Test Plan

Hi All,

We are new to Keyword-driven tests, and we are using SilkTest Classic 16.5. 

1) In the Keyword Driven Test UI editor, are there anyway to enter a comment on test cases?

We have written two test cases.  We are seeing the below sequences in the KDT UI editor.  In between the Logout of first test case, and the Login of second test case, can we enter a comment to describe what the test case is?  How can this be achieved?

Login (Test Case 1)

VerifyLogin

Logout

Login (Test Case 2)

CreateUser

Logout

2) If we are automating all our test cases with keyword-driven framework, what is the role for Plan?  Do we need to have one?  Currently we are running most of our tests through Silk Test Plan (.pln).