Boardview for the Z97-E desktop motherboard, revision 1.00, stored in a 187 KB RAR archive, with no manufacturer named in the file name. The Z97 prefix points to the Intel Z97 chipset family. Open the extracted layout in OpenBoardView, FlexBV or another boardview program to see component placement, nets and test points, which helps when locating a short or measuring rails. A near-identical file exists with the same revision, so they are likely duplicates.
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 @cyberlanelectonik. 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.
7-ZipWinRARThe Unarchiver (macOS)