A boardview (component placement) file (board LA-7912P). Shared as “LA7912P-R02.zip” — a .zip file, 385 KB.
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 @smschematics. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip