Using the same file name will not overwrite the existing document since these are two different file types. The exception will be is if you opened an RTF file to begin with, in which case you really need to use a different file name.
Using the same file name will not overwrite the existing document since these are two different file types. The exception will be is if you opened an RTF file to begin with, in which case you really need to use a different file name.