Click on the pencil to edit the group. 

 

 

 

On the edit page, scroll down to “All Contacts” and click on the tick box. Then, click on the bin icon to remove a contact from a group, as shown below: 

 

Note: Once you have selected the contact and removed it from the Group, remember to click the save button. 

 

To add contacts to the group, click on the Add contacts button as shown below. 

 

 

 

Having clicked on the Add contacts button, the below page appears, and you can then use the search button to look for contact or you can select from the list. Remember to click the save button.