User's Manual Part 2

To display defined zones along the Time (X) scale, select the Show on Profile command
on the Machine menu. When zones are displayed, they appear as Magenta and Blue
colored lines along the bottom of the data graph and as dotted vertical lines that extend
top to bottom. The Magenta zones indicate heating and Blue zones indicate cooling. The
first zone begins at the Process Origin. When the Process Origin is moved, the zones
move with it.
When importing SMG SPC (.MDM) files, the machine zones remain the same
zone colors as specified in the original (.MDM) file. If the user edits the
imported machine zones, or applies a defined machine to the data run the
zone colors will be updated Magenta and Blue.
5.4.4.2.10. Machine Zone Temperatures
For each defined zone, two zone temperatures can be established using the Set
Machine Recipe command on the Machine menu. These temperatures might be upper
and lower boundaries for the acceptable range of values in that zone or they might
represent the settings of upper and lower heating elements in a process.