Q:

--caption parameter used in KDE in Kubuntu 11.04

I right now installed Konquest in Kubuntu 11.04 and I noticed the item konquest --caption "%c" in Application Launcher.

Why is the caption overridden using --caption instead of taking the default one? Are there any useful reasons?
I tried but failed to find out if there are any more placeholders like %c for the caption and if yes, which. So far, it seems to be a feature of all KDE applications, as it is listed in --help-kde for each program.

A:

According to my research, it seems like --caption "%c" means "use the caption from the shortcut (.desktop etc.) as the application's window title."
One reason to use this may be to change the title according to locale, and the other one is to let user change it.

I added the list of those placeholders.
Click the question icon in Properties for one of .desktop Launchers, and then the Command field to get it.

%f - a single file name  
%F - a list of files; use for applications that can open several local files at once  
%u - a single URL  
%U - a list of URLs  
%d - the directory of the file to open  
%D - a list of directories  
%i - the icon  
%m - the mini-icon  
%c - the caption  

