Formatting summary view without gridlines

Formatting summary view without gridlines

This seems like it should be a simple update to the table themes.  We get requests for client lists fairly routinely, and I have a summary view that is user-filterable for things like budget size, region, sector, etc.  I also have a branded dashboard that I export as pdf containing this table.  I would really like the table to appear as a list instead of as an spreadsheet.  Is it possible to create a table "theme" where the grid lines are invisible?  Or just the topline is visible? 

 

Not this: 

Client Name

Website 

Client 1

www.website

 

This: 

Client Name         Website

Client 1                  www.website    

 

Thanks!