Assuming you mean the PS2 widescreen (ps2wide) feature for PlayStation 2 games/emulators, here’s a concise overview and steps to investigate or implement it.
Historically the central hub for these patches, hosting a massive database of custom codes for hundreds of titles. PCSX2 Integration: ps2wide
usually refers to a collection of patches, cheats, or modes that force PlayStation 2 games (which were natively designed for 4:3 TVs) to render in 16:9 widescreen. Assuming you mean the PS2 widescreen (ps2wide) feature
Navigate to Settings > Graphics and toggle "Enable Widescreen Patches" . Load the patch in the emulator (via menu → ISO Patching)