Difference Viewer located to the right of Visual Day Editor. It has label
"Planned" at the top. This viewer intended to show difference between
actual and planned appointments. There is no possibility to change
appointments in the Difference Viewer. This viewer contains holds snapshot
of planned appointments that was created at previous days. This snapshot
cannot be changed explicitly.
When you move mouse cursor over an appointment in Visual Day Editor, you always
will see the corresponding planned appointment in Difference Viewer (it will be
highlighted using the yellow color frame). When you are changing recurring
appointment that was created at some previous day the planned appointment will
not be changed. However, if you are changing the newly created appointment the
corresponding appointment in Difference Viewer will reflect all changes of this
newly created appointment.