Boardview for Lenovo motherboard NM-A361, delivered as a compact 811 KB RAR archive. The NM- prefix is the numbering used by LCFC, the Lenovo-owned ODM, so the board will carry this code on its silkscreen. Boardview data lets you click a net and see every connected pad, locate test points and find components hidden under the keyboard side. Open the extracted file with a viewer such as OpenBoardView, FlexBV or Boardviewer, and confirm the revision on the PCB before trusting component placements.
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 @fixtronix. 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.