To change the name of a group, tap the name. Enter a new name and apply by pressing enter or tapping outside the text input.
To change the emoji of the group, tap the emoji and an emoji picker will appear where you can search and select a new emoji for that group.
To change the position of a group on a board tap and hold on the header area until you see the group get a green border. Move and drop in the desired location.
To resize a group hold down on the side of the group and drag