Step1: Navigate to the team to which you want to add a new member.
Step2: Once on the team, press Spacebar to open the context menu.
Step3: Press Control+Option+Right arrow key until you hear “Add member,” and press Return. The Add members dialog box opens. The focus is in the text field for new members.
Step4: Start typing the name of the contact or group you want to add. Press the Down arrow key until you hear the name of the contact or group, and press Return. Repeat this step for all members you want to add.
Step5: Once you’ve listed the contacts or groups you want, press the Tab key until you hear “Add members to team,” and press Return. The new members have been added to the team.
Step6: To exit the dialog box, press the Tab key until you hear “Close,” and press Return.