Hi, 

Are you referring to Microsoft Windows or application windows? Please elaborate in more detail what you would like to know. 

If you want to use your A3 glasses with a Windows PC, Lenovo VDM is probably the way to go - Lenovo Virtual Display Manager (VDM) for Windows 11 and 10 - Lenovo Support. (This is not using Snapdragon Spaces) 

Snapdragon Spaces for A3 is not officially supported on Microsoft Windows. If you want to use the glasses with a Windows PC please refer to Lenovo's guide on VDM  Lenovo Virtual Display Manager (VDM) for Windows 11 and 10 - Lenovo Support GB