Discover where program settings are located. These are found in a plain text file named xnview.ini located in:
(1) The program's folder
(2) User's home folder
(3) Windows folder
Determine whether or not misconfigured options are the cause of problem by following these steps:
(1) Close program
(2) Rename xnview.ini to something else (xnview.bak)
(3) Restart program (new default settings will automatically be created)
Other common steps which help determine if a problem exists:
(1) Use the latest version of program
(2) Rebuild thumbnail cache
When describing how problem can be experienced by others, mention the version of operating system.
English is a secondary language for many visitors here. Because of this, providing screenshots can be useful (a service not provided by this BBS)- although a program addon has been recently added to send images to a web service.
Finally, the author occasionally asks for a problematic file to be provided. These are sent to the following address (shown in image form according to forum rules):

marsh