Go to the list given on the left hand side or you can click on the option ‘Add Files’ given above.
To select all files together click on ‘Check All’ but if you have to select individual files you can click on the check boxes shown with the files.
First check ‘Enable’ checkbox and then click on ‘Select’ option to copy or move the files after renaming in the destination folder.
Select the check boxes to include the given options as per your choice. Rename file name from "File Name Property" option by giving prefix, file name, separater and unique parameter.
Select the checkbox of option ‘Extension’ and write the extension in the box given below.
To rename files manually choose ‘Custom Rename’. After that Right Click on the file and you will get the option to rename manually at the last. Then you can make changes by going in ‘Custom Rename’ tab.
Choose extension from the box ‘Filename Filter’ so that files of only that particular extension should be there for Renaming.
Click on ‘Start’ and the work is done.