The final step of coaxial powering includes the actual voltage and current calculations of all the coaxial devices and updating the Amp blocks and supply block information from those calculations. This is accomplished using the Process Powering command from the Coax tab:

An alternate method to begin Powering. (See also the Placement section.)

This command should not be executed until all powering elements have been placed in the design-including all power blocks (or power boundary), inserters, splitters, power cables, and the power supply itself. When Process Powering is selected, the user will be asked to click on the power supply or boundary to be processed, rename or accept the name of that power supply, and then click OK. This will begin the powering and calculation mode of the selected power supply. When finished, there will be a highlighted route showing where the power calculations occurred.