★What is Layer 0 used for in ZWCAD

Issue:

In ZWCAD, each drawing will contain layer 0. What is the purpose of layer 0?

Solution:

Layer 0 has the following characteristics:

1. Each drawing must be there and cannot be deleted
2. The blocks created on layer 0. When they are inserted into other layers, the objects in the block will follow the properties of other layers, such as color, etc. 
3. The layer 0 of the xref file uses the properties of layer 0 in the current file, and the layer 0 of the xref file is not visible in the Layer Properties Manager.

In short, layer 0 is mainly used to create blocks that will follow the layer properties when inserting blocks to other layers.