★How to change Z value of coordinate to 0 in ZWCAD

Issue:

Some entities were drawn in 3D space which created different values on Z coordinate. 

Another case is that the drawing is exported from some 3D software, and the Z coordinate of entities are not 0, too.

How to change all selected entities to 0 on Z coordinate in ZWCAD?

Solution:

1. Click Change Z Value of Coordinate to 0 in Express on the Ribbon, select the entities to select all then press Enter to change the values to 0 for Z coordinate.
   Note: if you want to select all entities, just input ? when it promts you to select objects and then input A for "All" option.
   
2. Or click Change Z Value of Coordinate to 0 in Tools in Express on the menu, select the entities then press Enter to change the values to 0 for Z coordinate.