Datasheet in PDF form for the LCD module PS320240FRC-BNN-C01, document revision B. The 320240 portion of the part number points to a 320 x 240 pixel graphic display, and the suffix codes usually encode backlight, polarizer and temperature options. A technician uses such a sheet to confirm the connector pinout, supply voltages, contrast and backlight requirements and interface timing before replacing or rewiring a panel. Compare the full suffix printed on the module label with this document, since variants differ.
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 @acodis_lcd_datasheets_EDID. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.