To search the tests in a project by test name, use the project view search bar.
Project tests filter as you type.
To filter by test type, use the test type menu.
Only selected test types appear in the project files pane.
Both search filters can apply at one time.
Click Test as Step button to show all tests used as TestAsStep from another test in project.
Right click on any test used by another test offers context menu and a 'Used By' option that shows a dialog box with listed all tests that use the initial one.