Boardview for the ASUS X509FAC laptop mainboard, revision 2.0, stored in a 444 KB RAR archive. The name gives no ODM board number, only the model and revision. Such a layout file shows component outlines, pin nets and test pads, which helps when tracing a missing rail, locating a shorted capacitor or finding the charger and PWM circuitry. Use a boardview program such as OpenBoardView or FlexBV to open it, and verify the revision on the PCB before relying on part locations.
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 @BoardSchematic. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.