Every live report has the same who box. Workstation is one of the type ticks, next to server and laptop.
Open Morning brief. Under who, no type is ticked. The line says 6 of 6 machines. Workstation is one tick in that row, next to server and laptop. Limit a report to laptops is the laptop tick. None ticked still includes a machine with no type set.
Tick workstation. The who line says 1 of 6 machines, and 0 online. Reception PC stays. The type column says workstation, the disk is 48%, checks are ok, and there is no open alert. The why column says ok. Reception PC is off, and it is excluded from offline alerts, so being off is not attention. The offline tile still counts 1, because the machine is not connected. Attention is 0. Spare laptop is a laptop, so it drops out, along with Accounts server, files01, Lab host and Branch router. Clear filters appears once a type is ticked. This guide presses it at the end, so the next report is the whole company again.
Servers are Limit a report to servers. Laptops are Limit a report to laptops. A network device is Limit a report to network devices. A hypervisor is Limit a report to hypervisors. The morning list itself is Read the morning brief. The type on the machine is Change what kind of machine this is. An alert rule limited the same way is Limit an alert rule to workstations.