Along with VBA and LISP functions, optimized process principle of high priority from code level, and switching between ZWCAD+ and ZW3D, ZWCAD+ 2015 SP1 offers accelerated opening of large files for computers with RAM not less than 3 GB. Support for multiple memory resources also enables large file processing without inducing crashes. Google Earth import/export lets designers, by acquiring accurate location information by GEIN and generating KML file by GEOUT, review designs on Google Earth.