JRC JMA-9832-SA Instruction Manual page 218

Attention
When all targets are deleted, the system stops tracking all the targets and targets have to be
acquired again automatically or manually. So, do not use this method except when it is necessary
to delete all targets.
Deleting all targets
ACQ
Procedures 1 Press continuously for 2 seconds or more.
CANCEL
All the symbols and vectors of all targets will be deleted.
5 – 31