Boardview in CAD format for the ASUS UX333FN, with the name suggesting board revision 2.0. A boardview maps every component, net and test point on the PCB, letting you click a part and follow its connections when hunting a shorted rail or a missing voltage. CAD boardview files open in tools such as OpenBoardView, FlexBV or similar viewers. At 1.15 MB it is a compact layout file; compare the revision silkscreened on the motherboard with this one before trusting part positions and net names.
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 @notebookschematic. Enginerys does not host this file.
How to open a .cad file
GenCAD text export, the usual format for Compal, Quanta, Wistron and Dell / HP / Lenovo laptop boards.