XnView Software

XnView: MP 1.9.8 - 64 bit
OS: Windows 10 - 64bit

When a paletted 4-bit PNG is zoomed in, it turns into a series of stripes. Apparently, one column stretches across the entire width of the image.
gradient_dither.png
screenshot.png

ImageMagick command to create such images:
magick.exe input.png ...

Window title bar is white when dark theme is active:
XnView_MP_white_titlebar.png

It is posible to make it black
XnView_MP_black_titlebar.png

by adding to qt.conf those lines:
[Platforms]
WindowsArguments = darkmode=1

or launching XnView with platform argument:
"C:\Program Files\XnViewMP ...