Setting Variable at Keyword Driven Test

I use trial version now.



My Testing Application is legacy web application.(jsp only java web application).



It indicates list data at html table but not using id tag and class tag.So, I can't decide target test data by Navigate object.



I attempt to get test data by On-Screen Action (Ctrl+C and Ctrl + V).

I want to set on-screen data to Variables of keyword Driven Test.



I have a quetion. 



Can I use Variables in Keyword Test at Dynamic?

(I understand variables by using static.)