Thanks, will look into this. No idea how to use automator though so need to research. Just had a quick look and doesn't appear straight forward.use the build-into-OS-X "Automator" and make a workflow using Preview to resize (I think it's there with all the step necessary included).
Thanks, just posted this after youYou can easily resize multiple photos with Preview. There's no need to use Automator for a function like this.