Disable alt+brush change opactiy

Thanks, changing the vertical for brush softness didn't change anything, it still does opacity change. But still, both are a problem to painters. Let's say you are a comic artist or doing line art. You want to use sharp hard round brushes with various sizes but you don't want them to suddenly go soft, and you definately never want them to become 95-98% of opacity. They need to stay hard with 100% opacity constantly while painting, but still you would want to use the alt + drag pen to change size because it is an efficient way to work. . I just hope adobe could do this, so many has asked for it, for multiple years, and I assume it's a tiny feature to add.  

In the meantime, does it help if you go to Edit>Preferences>Tools (Windows) or Photoshop 2025>Settings>Tools (Mac)

and check VaryRound Brush Hardness based on HUD vertical movement, so instead of the opacilty changing it would be hardness, which only applies to the default round brushes?

This is with a tablet, using the pen. Because you hold in alt and left right is brush size and up down is opacity. You can see a plethora of people over the years that have asked for an option to disable the opacity. With a mouse it is of course not a problem..., which is why I stated it's with a stylus/pen 😉

How do you change the size of the brush? I use the default Alt + right mouse key and move the mouse left or right to change the brush size. I don't have any problems with a changed opacity after changeing the size.

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