Select the file you want to rename.
Click the Rename this file link.
The current name is highlighted. Type the new name and press Enter.
The file is renamed.
If you did not use a descriptive name when you saved the file, you can rename it. You can rename only a single file at a time.
You can type as many as 255 characters, including spaces. You also can include letters, numbers, and other symbols except the following:
Do not rename program or system files. Doing so can cause program or system problems.