Datasheet page set for the PG320240-H family, saved as part P2 in a small 80 KB PDF, which suggests the document was split and this is the second portion. The model code points to a 320 x 240 graphic LCD module in its H series. Look for the remaining pages if pinout or timing tables seem incomplete. Engineers and repairers rely on such sheets for connector pin functions, supply and contrast voltages and the mechanical outline when fitting or diagnosing a 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.