A boardview (component placement) file. Shared as “B660 GAMING X AX DDR4 r1.0.tvw” — a .tvw file, 3.88 MB.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .tvw file
Binary boardview from Tebo-ICT test software, frequent for Gigabyte, MSI and many newer laptop boards.