I have reordered 95 images into a Collection and need to export them to the hard drive as a numbered sequence - no filenames, just numbers (with or without extensions). Can someone tell me how to create a preset to do that or some other method? Thanks much.
In Library module, select the images you want to rename, then choose 'Rename Photos' from Library menu. Choose File Naming from drop-down menu, Choose Edit, then configure as below screenshot. Also best that you save for future use.
Ian's example above will actually rename the originals. You can do the same thing in the export dialog box, renaming as you export. This preserves the original file names on disk and only creates the numbered sequence for the exported copies.