Tag ID Tag Name Writable Values / Notes 0x03ee AlphaChannelsNames N 0x0404 IPTCData - --> IPTC Tags 0x0406 JPEG_Quality - --> Photoshop JPEG_Quality Tags 0x040b URL N 0x040c PhotoshopThumbnail N
Index Tag Name Writable Values / Notes 0 PhotoshopQuality N 1 PhotoshopFormat N 0 = Standard
1 = Optimised
257 = Progressive2 ProgressiveScans N 1 = 3 Scans
2 = 4 Scans
3 = 5 Scans