PG12232-A graphic LCD module datasheet, a small 85.1 KB PDF. As a base variant sheet it likely provides outline dimensions, connector pin functions and key electrical ratings, with option letters distinguishing backlight and temperature versions. It comes in handy when tracing why a display shows nothing, by checking logic supply, contrast voltage and enable signals at the connector. Compare the module code and mounting holes with this sheet before choosing a replacement panel.
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.