Referring to the clause stated in TBDY 2018 7.13.1.1, the environmental exposure class will be specified on the drawing sheets, you can select the "Environmental exposure class" from the drop-down list on the Analysis Settings/Other tab to be shown on the drawing letterheads .
Process Usage steps:
Open the Analysis Settings dialog.
Click on the other tab.
Choose from the list of environmental exposure classes.
The selection you made on the letterheads will appear when you draw.
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