I cannot find the way to edit which icons are visible in each thumbnail in the main window. Could someone guide me, please?
Which icons do you mean?
The Icons used in the File Window (https://www.photools.com/help/imatch/fw_basics.htm?dl=a_icons)?
You cannot edit these.
If you want to show custom icons, check out Using Custom Icons in the File Window (https://www.photools.com/3906/custom-icons-file-window/).
Or, if you just want to hide the icons, see the The Full Layout Editor (https://www.photools.com/help/imatch/fw_basics.htm#a_layout?dl=h-63) section. You can decide if icons are shown or not for a given thumbnail layout. But you can not selectively switch them off, if this is what you have in mind.
Thank you.I have achieved what I need from the full layout editor.
And what you needed was?
Just turn the icons off?