It would be great to have a way to copy a particular customization to particular apps. For example, I adjusted the forward/back thumb buttons for any MS Office program to be redo/undo. After that, I changed the options on the hidden thumb button under my General settings, but I wanted that change to apply even to those customized apps. It would be good, when customizing like that, to have an option to port the changes into the settings for other apps!