Generally, NOTCH is used to eliminate sharp peaks in the audio spectrum, typically hets/whistles, but they can also be peaks on lower frequencies. JAGUAR PRO offers a special AUTONOTCH designed for MW listening. JAGUAR PRO also allows a maximum of 20 manual notches to be set.
AUTONOTCH is a "safe" notch as it can be kept always on without negative side effects in the audio.
AUTONOTCH is always on by default, but JAGUAR PRO users can toggle it also off in SETTINGS > AUDIO > AUTONOTCH.
Unlike "typical" autonotches, JAGUAR's autonotch is not based on continuous scanning of the audio spectrum so there can be carriers/interference anywhere in the spectrum not cleaned by the autonotch. Those must be handled manually. We know from experience that a "scanning autonotch" often causes more harm than benefit so experienced MW DXers normally do not use classic autonotches.
JAGUAR's autonotch never checks whether there really are hets/whistles/peaks in the audio; it just relies on the AM frequency spacing. A better name for this feature would be "Trans-Oceanic Autonotch". When you listen to 10-kHz-spaced frequencies, the autonotch works on the potential hets e.g. caused by nearby EU frequencies but when you listen to 9-kHz-spaced frequencies, the autonotch works on the potential hets caused by the 10-kHz-spaced frequencies. This is mostly useful for listeners in the USA. Otherwise, every other annoying het must be notched manually.
So, JAGUAR's autonotch handles only 1 kHz / 2 kHz / 3 kHz / etc. hets, based on the nearby EU (or U.S.) frequencies. When AUTONOTCH is enabled, it takes the hets away from both sides of the SSB modes, based on the frequency you are listening to. For example, if you are on AM 1030, the autonotch will always clean 4 kHz and 5 kHz when on LSB or USB.
The notch can be seen as a triangle if SETTINGS > GRAPHICS > AUDIO_ON_TOP has been enabled. The notch can be removed by clicking that triangle and new notches can be added by clicking any position (usually on a stable het peak) on that audio curve.
You cannot directly re-adjust the position of AUTONOTCH, but those notches can be tuned in AUDIO WINDOW. Notching (auto & manual) always removes a part of the "raw audio" so it is a challenging game. Some experienced DXers are very critical about classic autonotching but they can accept this type of "safe autonotching", and can keep AUTONOTCH always on by default.
MANUAL NOTCHES can be added/trimmed also in AUDIO WINDOW. See details in the AUDIO WINDOW help.