There’s no need to save MIDI Remote mapping as the Standard Remote mapping for each Reason Essentials device to supported control surfaces is built-in, and is always available. You may, however, wish to save specific Remote Override mappings or Keyboard Control setups as a template:
This could be done by saving a song document containing all the devices that are affected by the related Key or Remote Override mappings, but without any sequencer data.This song document could then be used as a starting point for any new song, by simply loading it, and immediately using “Save As” to save it under a new name.