Debug - Add Watch

At run time, highlight a variable and:

Ribbon bar. Select the Debug tab. In the Watch group, click Add to insert the variable into the Watch window, which tracks the values of the variables that are placed into it.

Classic menus. From the Debug menu, select Add Watch to insert the variable into the Watch window, which tracks the values of the variables that are placed into it.

Note that this command can also be executed by pressing CTRL+F9. See also Debug - Quick Watch.