Boardview named for the iPhone 7 Plus with the Intel baseband, in .bvr format. Its size of just 13.8 KB is unusually small compared with the Qualcomm 7 Plus layout at over 370 KB, which suggests the file could be partial, a placeholder or stored in a different internal form; test that it opens correctly first. A full boardview maps parts, nets and probe points so you can trace rails and locate shorted components. Confirm that the phone actually has the Intel modem, since the two variants use different radio circuitry.
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 @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .bvr file
Text boardview from the BoardView R family of tools, seen for Lenovo, MSI and Clevo boards.