Insert an Execution Delay to pause the test for a set amount of time. Set the "WaitTime" property of the step to any number of milliseconds.
While Verify and Wait steps are ideal to ensure elements exist and are correct before continuing, an execution delay can help in observing test execution.
As of version 2015 R1 you can find the custom steps in the Step Builder under General section.
If you want the test to pause for a set amount of time between each step during quick execution, use the Annotation feature.