To add a member to a list in Zenkit To Do, open the list settings (tap or click on the list name), and go to "Access". In the mobile app, you can also tap the "Share" button at the bottom left corner of the list.
Tap or click on "Add Member" then use the search to find a user you already collaborate with by name or email address.
If you want to invite a new user to join Zenkit To Do, tap or click "Invite Member to Zenkit" at the bottom of the add member dialog.
Type in the email address and full name of the user, then tap or click "Send Invitation". Once you've sent the invitation, you can begin adding them to other lists, or assigning them to tasks. Once they log in for the first time, they will have access to all the lists and folders you added them to, and will see all tasks assigned to them.
If you are part of a Zenkit Organization i.e. your company has a Business plan and has activated the Organization function, then you may also see an option to "Add group". This allows you to add all members of a particular group to a list at once. To learn more about groups, see our article on group management in the "Organizations" section of this Help Center.