Are you asking how to set up lanes in the Step Editor to see MIDI controller data? if that's the case, check out the video below. If the controller is outputting, say, MIDI Expression data (CC11), it should show up in the appropriate lane there, or in the Tracks area and Piano Roll Editor as Region Automation data (see screenshot).
If you're talking about re-mapping hardware MIDI controls to different values, it depends on the controller [does it have an editable profile for Logic?] You could also remap controller values on input with a Transformer in the Environment [placed between the Physical Input object and the Sequencer Input object].