Choose the machine and edit its tool parameters
Pick the machine in the download step to get its post-processor output, and edit a nesting machine's tool parameters in its settings dialog.
When downloading machine files for a work order, the machine chosen in the download step determines which post-processor output is produced, so selecting a different machine yields that machine's file format.
A nesting machine's tool parameters — including spindle speed, feed rate and plunge rate — are edited in the machine settings dialog for that machine, reached from the MES Settings → Machines screen or from the machine settings on a work order's Cutlist or Board Layout.