Dear all,

as titled.

Thanks for any kind of help!

Take a look at the gallery option or individual album options.

Thanks Acrylian for your comment!

I finally get the way:
-> Go admin backend -> click the tab "Albums"
-> click on the root level album
-> look for '''Sort subalbums by:''' -> select '''Title'''
-> click the "Apply" button to save your settings
-> That's it!