[web2py] reduce textarea rows in autogenerated form

[Markandeya]

Dear Friends of Web2py,
where do i go to edit the default number of rows for a textarea
displayed in a SQLFORM or CRUD form that is autogenerated from a
model? There are fields with a 'text' datatype. The textareas  are too
long vertically and they have scroll bars if more text area is needed
which is good. I also could increase the cols as i have width space on
my page.
  Thanks much, couldn't find textarea and rows in the base.css nor in
jquery.js.