To find this design item...
Step 1: After you log in, click on Calendars (brown box below).
The Your Calendars page will open.
Step 2: Choose the card view calendar you wish to modify. In this case, you can choose a cards (list) or (grid) view option (brown box below).
Step 3: Click on Design (brown box below).
Step 4: Scroll down and click on Frame and cells (brown box below).
Step 5: Scroll down until you find Card corner rounding.
To change Card corner rounding
Compare 20 px rounding (brown box and gold line in the image above) with 40 px rounding (brown box and gold line in the image below). Note that this design element applies to all four corners of the card.
To change the corner rounding, simply type a number on the relevant line.
Click Save at the bottom to save your changes.