Hi! There are two ways to record walking or running:
The first way:
In the app, press Record > + icon to choose an activity > Workout > Start
The "Workout" button will auto-detect cardio activities, and will detect other pre-trained activities you're doing.
The second way:
In the app, press Record > + icon to choose an activity > Walking/Running > Start
The "Walking/Running" functionality will only record this activity, and has the option to map your route with GPS.