★★How to set the default file format for saving in ZWCAD

Issue: 

Every few years there will be a new CAD file format, and newer file formats are usually not compatible with older CAD software.

How to set the default file save format, so that ZWCAD can save drawing files as older file formats?

Solution:

1. Execute OPTIONS command to open the Options dialogue, go to the Open and Save tab.
2. In the File Save options, you can set the default file save format as older dwg versions.