These options affect the standalone image viewer.
You can use several special "tokens" in the title string to insert various pieces of information:
%P | full path of the currently viewed image |
%N | name of the current displayed image |
%R | drive root of the current image |
%E | displays * if the image's metadata has been modified and not saved |
%I | current image's index (number) in the list of images |
%O | total number of images in the list |
%W | width of the current image |
%H | height of the current image |
%D | depth of the current image (bits per pixel) |
%M | current image's dimensions |
%S | file size on disk |
%F | folder name |
%C | collection name if current image is marked |
%L | any labels assigned to the current image |
%T | complete original title (useful for simply adding a prefix or suffix to the title) |
%% | insert a literal % character |
%! | hide empty blocks within %!…%! (see below) |
The %! code is special in that it should be used in pairs around the things you want to hide. They will be hidden if all tokens within the block expand to empty values.
Consider %!Dimensions: %W x %H%!, for example: If %W and %H (width and height) are unavailable (e.g. because the viewer isn't displaying an image) then this will output nothing at all instead of a meaningless "Dimensions: 0 x 0".