actually you can assign new icons to toolbar buttons from .ico, .icl, .exe and .dll files
it would be nice to support .png icons as well
many icon sites offer icons in .png format and to use those in XnView toolbar I have to convert them to .ico first
support png for custom toolbar icons
Moderators: helmut, XnTriq, xnview
Re: support png for custom toolbar icons
Thanks for your suggestion, Tommy. Support for png sounds reasonable and shouldn't be to hard for a tool that converts images.
It's a less frequent use case, though, and there's just so many other things to do and finish, first.

Re: support png/svg for custom toolbar icons
+1 I support this reiterated request (2011-2012-3013) - (png & svg)... and for MP version tooTommy wrote:re-bump

XnViewMP Linux X64 - Debian - X64