From the Test Case Editor, you can edit a Test Case. You can:
add other Test Cases (Section 3.10.4, “Adding items to editors”).
add and edit Test Steps (Section 3.18.2, “Specifying Test Steps”).
add and edit conditions and loops (Section 3.13.1, “Overview of Conditional Statements and Loops”).
rename the Test Case (Section 3.9.2, “Renaming items in browsers”) or the Test Cases it contains (Section 3.10.6, “Renaming items in editors”).
add a comment to the Test Case (Section 3.10.7, “Adding comments to items in editors”).
add or edit data for the Test Case (Section 3.14.11, “Using the Data Sets View to enter data loops”).
extract Test Cases from within this Test Case to make reusable modules (Section 3.10.12, “Extracting Test Cases from editors: Refactoring”).
deactivate specific Test Cases in this Test Case so they are ignored during execution (Section 3.10.10, “Commenting out items in editors”).
replace one or more Test Cases in it with another Test Case (Section 3.10.13, “Replacing Test Cases in editors: Refactoring”).