You can add execution results for your manual test case by going to the test case edit page and clicking on the icon as shown below:
Then provide the actual results for each step, browser types, and additional comments.
Once the manual test case execution results are saved, you can look at the details of the results by clicking on the icon highlighted below:
Then, you will be routed to the following page where you can view the entire execution history of your manual test case:
