Hi Akash B R,

Thanks for contacting us. It seems like the problem you're facing might be because your current board is set to "low-fidelity mode," which is meant for simple drafts without much focus on style.

To change corner radius, colors, fonts and more flexible styling, please switch to "high-fidelity mode" using the "Design" button on the header menu. Please see the attached picture.

Hope this solves your issue.