Danny wrote:I use them.

OK.

Perhaps this explanation of these options could be edited for FAQ section.
Example:
Auto Image Size options (what to expect from them):
'Fit image to window, large only'- shrinks image to best fit window/screen
'Fit image to window, all'- expands or shrinks image to best fit window/screen.
-Xnview best fits small images by centering them on window/screen.
'Fit image to window width'- expands or shrinks image to meet left and right of window/screen.
'Fit image to window height'- expands or shrinks image to meet top and bottom of window/screen.
'Fit image to desktop, all'- expands or shrinks image and viewer to best fit edges of desktop.
'Fit image to desktop, large only'- only shrinks large image and viewer to best fit edges of desktop.
-Xnview best fits viewer on screen by centering it first.
'Fit window to image'- expands or shrinks window to meet image. Multiple unmaximized windows can be displayed and arranged.
'Force Xnview to fit image'- It will match global window to size of image. It is positioned on center of screen.
-Related options:
'Maximize view when Open'- expands image to fill Xnview's workspace/desktop. Useful when only displaying one image at a time.
'Only one view opened'- unselect this to display multiple images at the same time.
'Use different position/size for browser & view'- is useful in preventing Xnview's browser from matching the viewer's size and position while using some 'Auto Image Size' settings.
'Folder Tabs'- can make switching between multiple images more convenient. It is disabled by going to browser menu and changing View>Folder Tabs.