If the Simulation is linked to an audit '&' the low & high pressure set points were configured during the Audit Wizard configuration step then you will 'NOT' be able to change the 'low' and 'high' pressure set points of these air compressors on the 'RED' line of Simulation Wizard.  You will neither be able to re-order the compressors on the 'RED' line of Simulation Wizard.

This is because the Audit Wizard data takes priority!

If you want to edit the low and high pressure set point of the air compressors on the RED line of Simulation Wizard, first go to Audit Wizard and remove the 'low' and 'high' pressure set points configured in Audit Wizard and 're-sync' the audit.

Then return to Simulation Wizard and create a new Simulation.  This time Simulation Wizard will use 'default' 'low' and 'high' pressure set points for each air compressor in the Simulation.  You will be able to modify the default 'low' and 'high' pressure set points of these air compressors on the 'RED' line of Simulation Wizard and you will be able to re-order the compressors on the 'RED' line of Simulation Wizard.