I have taken a screenshot of all or XnView 1.9x "Effects" found in it's window.
(click on thumbnail)

Does anyone think that for XnView MP, the "Effects" should have it's own top menu in the viewer mode?
All code for each Effect would be the same, I'm discussing here about how it would be better laid out in MP

The "Effects" top menu would have all the menu items and sub-menu items beneath it, like how Paint.NET displays it: ------------------------------------
Perhaps, maybe a Toolbar mode too for all or some "Effects".....
beow quote is from an earlier version of this same topic;
In xnview win, as we all know, on the menu bar in Viewer there is Filter>'Effects' which is not yet available in MP.
I am saying that when it does get ported to MP, it would still be in the Filter>'Effects' or maybe even this time under Image>'Effects'
- but also a toolbar could appear at the same time, similar to the existing 'Spotlight' or 'crop' toolbars:
.....with also an option somewhere in MP to be able to disable showing of this toolbar