This feature requires an active KAYA PRO subscription.
From the list page:
Open your list and tap the + icon at the bottom center of the screen.
Select the climb type (Outdoor, Gym, Board, or Grade List).
Search for the climb or gym.
Tap the climb to add it.
From the climb's page:
Navigate to the destination, board, or gym and find the climb.
Tap the "Add to Lists" icon in the top right corner of the climb page.
Select the list to add it to.
From another list:
Tap the + icon next to the climb you want to move.
Tap the list you want to add it to.