Drag a Unit out of the Units column and into the Add Column area of the Assignments screen and release. A Create Group window will appear. Type the Division or Group name into the window, select either Group or Division. Tap Save.
Alternatively, tap and hold the desired Unit to bring up the wheel menu. Choose either "G" for group or "D" for division. Name the Group or Division and tap Confirm. The new Group or Division will appear as a new column on the right.
NOTE: Units can be moved out of their initial Division / Group assignment and the Division or Group column will remain.
From the Units screen, tap and hold the Unit you wish to assign. Select the opposing arrows icon from the wheel menu to open the Assignments menu. Select one of the preconfigured assignments from the menu and tap to confirm.
Alternately, you can select Add Assignment to create a new assignment on the fly. Type the assignment acronym into the window and tap Confirm.