Hey there. I put the answer to this in another post. Re: Huion h420 pen pressure not working in adobe photoshop
I just replied with this:
Hey. Just showed up on my youtube feed randomly. Though the video is for this guy on his wacom, it works for me with the huion 420.
Just follow the file path above. To confirm, I placed the text file in the Photoshop CC 2015.5 Settings folder. I don't know if it'd make any difference if you put it in the Photoshop 2015 Settings folder (notice 2015 and not 2015.5). I placed it in the update folder.
C:\Users\YOURUSERNAME\AppData\Roaming\Adobe\Adobe Photoshop CC 2015.5\Adobe Photoshop CC 2015.5 Settings
1.) Got to the file path up above. Make sure in your windows explorer menu to go to view and unlock your hidden items (its in the video).
2.) Make a text file named PSUerConfig.txt
3.) Add this in the file:
# Use WinTab
4.) Open up Photoshop and brush away. Sensitivity should be there. At least it was for mine.
When I put pressure, I get the sensitivity of the strokes on Photoshop. Hope this works for you!
Photoshop 2015.5 (just updated like 2 days from today).