Html Attribute

How to Styling Table Widget .

Hello, I’m using Bonita soft community 6.3 I take one table widget on from and data is pulling out from database. but it display ugly screen

** I want to add table border and etc. Styling.** How can I apply styling on this table widget?

In gen > option >HTML attribute I write: style="border: 1px solid black;" But does not anything happen. Pl help. How to achieve