Hi

Please open tracer and click watch, it will ask you to provide the page name and property name. In my case i set it as pyWorkPage and pxUpdateDateTime . Refer below screenshot

Once you are done with this, start tracer and resume other work.When the Tracer next detects a change in the property value, it displays a Property Inspector area in the lower left area of the event window and the event will pause ( find below two screenshot of property inspector and the tracer which is paused and having yellow highlighted row )

You can then check the values in the property inspector window and update it if required and click the resume button of tracer to take it forward.

Find the below screenshot which depicts on how the values get displayed in the property inspector space and how it prompts you for the update.

For more details , please refer : https://community.pega.com/sites/default/files/help_v719/procomhelpmain.htm

Also note that I was able to make it work only on IE and not in Chrome ( perhaps a bug which i need to check with Product engineering team )

Hope this helps.