This capability may be in the advanced dialog. I, however, am not an advanced user. In the drop down Rename list box add both a number files and unique number files (both randomly). For example: instead of 001 002 ...010 we could have 010 002 005 ...008. I sometimes have a long list of files in alphabetical order that I would like to mix randomly. If I am the only one, then don't bother. If there is some interest, please consider something like this for those who are more or less restricted to menu choices.