Backward/forward
When the area information in one and the same Pattern is edited sequentially, the past 9 pieces of the area
information (10 pieces of the area information including the present area information) are recorded, and press-
ing the [Back] and [Forward] buttons can go back and forth among the 10 pieces of the area information.
However, if a tab or Pattern is switched, the past area information is reset and the [Back] button is disabled.
<Example of transition>
Latest
10 times before the present
"BWD"
"FWD"
1 time before the present
Omitted
"FWD"
"FWD"
"BWD"
"BWD"
2 times before the present
47