XnView Software

XnViewMP 1.4.0 64bit
Windows10 64bit (22H2), display resolution 3840x2160, win scaling 150%

Viewer / Batch convert - Levels...
not possible to split/move controls

To reproduce:
1. run clean portable XnViewMP
2. open any image
3. press L to open 'Levels...' dialog
4. move grey slider to the left
now it is not possible to separate it from black slider
5. move white slider to the left
now it is not possible to move it at all


Related

• issues
  1.4.4 - levels - grey pointer has no limits
  1.4.0 - levels - not possible to split/move controls (current post)

Both Bugs Confirmed!

Thanks to your detailed description I can reproduce the problem.

This problem is supposed to be fixed in XnView MP 1.5.0 beta. Please check and confirm the bug fix here.

1.5.0b1

• C
  - grey pointer still sticks to white pointer (unsticks only when its value edited manually)

yes normal, when moving the white cursor, we keep same gamma value. In PS it's the same

need few tweaks to make the same than:

• add the same sticky behaviour to the black+grey pointers as well (pure consistancy reason)

• add ability to split sticked pointers by clicking on the nearest half (yellow) of the distance between black and white pointers,
  eg if you click on yellow part of the range grey pointer (sticked to white pointer) will jump there.