This video demonstrates how a ui identifier of an element is created manually in Testsigma, https://testsigma.com/ using browser developer tools.

An alternate method that Testsigma offers is using the Chrome extension that Testsigma provides. Refer the video link: https://youtu.be/Q2QOmclAx2A?list=PLgSCqw7P2NbwOYJcpdIocB5v0B07JTxKd