New group/work item 
Using this button, you can enter either a new group or a new
work item in the current group. The groups and the
work items are indicated by 
and 
respectively, so that they can be
distinguished. You should enter the description of each group, and in the case
of a work item you can also enter the unit of measurement and unit price.
At least one
group should exist before entering any work items. Otherwise, the following
message will appear:
You can use the shortcut of Ctrl
+ G
keys to create a new group and Ctrl
+ H
keys to create a new work item.
You can move groups or work items to a
different position later on. Add the desired group/work items (if it doesn’t
already exist) and then move it by placing your cursor on the symbol that
characterizes it ( or respectively) and dragging it to the
desired position. During this action, the following symbols 
, 
,
appear. The light blue arrows
, indicate the upward or downward direction
of movement respectively, and the green indicates the new position. Moreover the
symbol is used by the
application to indicate the positions where moving is not allowed. Finally, the
buttons
allow you to change the hierarchy of the groups at a later time.