Software: Word (Office)
User query: Add headers to files, header content is 'GUICritic'
Difficulty: hard
Ground-truth plan:
Task 1: Create your own header with custom text.
Subtask 1: Double-click the margin at the top of your document to unlock the header area.
Subtask 2: Type 'WordGUI' into the header.
Task 2: Finalize the header.
Subtask 1: Access the 'Header & Footer' tab that appears on the right side of the ribbon when the header is unlocked.
Subtask 2: Close the header by clicking the 'Close Header and Footer' button or by pressing Escape on your keyboard.