That's basically what I copied/pasted from Canon's material. Were you saying "no" to me or to Dilbert?No, highlight tone priority changes the way JPEGs are rendered in the camera.
No.QuoteHighlight Tone Priority (HTP)
All cameras have a fixed dynamic range, from shadow to highlight, that they can capture. HTP shifts some of the available dynamic range from the mid-tones to the highlights to produce smoother tones, with more detail in bright areas. This helps prevent JPEG images with overexposed highlights that can’t be recovered. HTP is also useful to RAW shooters who process their images with Canon’s DPP software. Most third-party RAW processing software will not recognize Highlight Tone Priority.
When the camera is set to HTP, the lowest available ISO will be 200. The HTP setting will be indicated by a D+ symbol in the LCD display. Avoid using HTP in low light or when shooting subjects with heavy shadows because it may cause more noise to appear in those areas.
No, all it does is underexpose 1 stop secretly and then shift the mid-tone point and roll off highlights differently for in-cam jps and it sets a flag to tell RAW converters to do the same. You can get the exact same thing out of underexposing 1 stop and then using an altered tone curve.