These models are compatible with most unfolding software. All lines and faces end in a closed loop. Only one surface is drawn, so watch out for your material thickness. Graphical reference display is drawn on screen. Follow the prompts.
Flanges can be up, down, different sizes, etc.
If value entered is negative than a down flange is drawn. If a zero value is entered then no flange is drawn. Reliefs can be different sizes, or no relief if desired. Negative value draws flange to inside of pan, Positive to outside. Linetypes are chosen for up flanges.