XnView Software

XnViewMP 1.8.3 64bit
Windows11 (24H2), display resolution 3840x2160, win scaling 150%

Settings - thumbnails - appearance
thumbnail's Border size setting affects padding, not border size, which is inconvenient

Suggestion
A

• add Label group

• fix Border size setting
  - rework Border size to increase border size instead of Padding
  - add Padding size setting

• add Rounded border functionality (see FastStone example)

B
same as A, plus

• split 'Thumbnail cell' group into
  • Cell
    • move Border and Spacing settings here
  • Cell background
    • add 'Use color from' [Rating, Color label, Format] (see Lightroom example)
    • rename Background → Base color
      
      so the cases are:
      ☐☐ - use filelist bg color
      ☑☐ - use rating/label/format color, if not available - use filelist bg color
      ☐☑ - use base bg color - same as current state
      ☑☑ - use rating/label/format color, if not available - use base color
    • add Opacity

Example

• FastStone

  

• Lightroom

  

Related

• suggestions
  Browser - thumbnails - overlay icon - align bottom row icons
  Browser - thumbnails - rework Rating and Color label
  Settings - thumbnails - appearance - improve settings (current post)
  Settings - thumbnails - overlay icon - add more sizes to avoid interpolation
  Settings - thumbnails - overlay icon - add custom spacing
  Settings - thumbnails - overlay icon - add custom positioning
  Browser - thumbnails - overlay icon - split top row icons
  Overlay icons cosmetic update
  - done -
  Browser - thumbnails - add custom content anchor in cell (1.8.4)