This command opens a dialogue box in which you can assign a different name to the current sheet.
Choose Sheet - Rename Sheet.
Enter a new name for the sheet here.
You can also open the Rename Sheet dialogue box through the context menu by positioning the mouse pointer over a sheet tab at the bottom of the window and clicking the right mouse button.
Alternatively, click the sheet tab while pressing the Alt key. Now you can change the name directly. The availability of this function depends on your X Window Manager.