how to open the DWG file in cad? Set ZWCAD as the default CAD software.Free DWG Viewer.
If you want to set ZWCAD as the default CAD software to open *.dwg file, please refer the following steps:
1.Right click a dwg file,go to "open with"-->"Choose default program"
2. Choose ZWCAD program as, and check the option "always use the selected program to open this kind of file"
In this way,when you double click dwg files, they would be always opened with ZWCAD.