The below steps are detailed for the V7.0 version. If you are using V6.0, the steps will be slightly different.
Open Pattern Design software and create a new file, then click menu [Options]-[Preference], select the unit (in/ cm / mm) in your need.
Finish the primary pattern making of BLK.M Shirt:
Then you can follow the following manual to learn how to set pieces and how to add seam allowance.