Add Contacts to Test Send Group
Step 1: Search for Contacts
Search for contacts in the "Search Box" of the left panel.
Step 2: Tag Contacts
Click the Star icon next to the contact name to tag contacts which you want.
Step 3: View Tagged Contacts
Navigate to Tagging Basket by clicking the icon on the top bar.
Step 4: Add Contacts to Group
On the bottom of Tagged Items, you can see some buttons for bulk action. From drop-down menu More Actions, select Add to Group, then click the Go button next to it.
Step 5: Choose "Append to Group"
In the Action field, choose Append to Group.
Step 6: Choose "Test Send Group"
In Group field, depending on your need, choose either Test Send Group (Email) or Test Send Group (SMS), then click the Save button.