Method 1: From the viewer

1. Tap the Overflow button to open a overflow menu.

2. tap Save a Copy from the menu.

3. Tap Identical Copy.

4. Select the file destination when prompt and give the file a new name.

Method 2: From the file browser

1. Tap one of the file browsing tabs, Folders, All Documents or SD Cards.

2. Long press on a file to bring up the file management options. Tap the Duplicate icon to make a copy of a file.

You can also tap the file's Information icon, then tap Duplicate.

3. Long press or tap the Information icon of the newly created file copy, and tap the Rename.