Hover over the library name to show the ⠇edit menu

Select the ⠇edit menu

Select Invite members

Under Invite members, activate the member list to drop down a list of users that can be invited to library

Select user(s) to invite

Review / modify library member access level

Select blue 'Invite # users' button

Select the Edit menu in the header next to the library name

Select Invite members

Under Invite members, activate the member list to drop down a list of users that can be invited to library

Select user(s) to invite

Review / modify library member access level

Select blue 'Invite # users' button