Please be patient. I do not know if what I'm asking for exists or does not.
Every theme has a sidebar. Every sidebar has (for example) an archive list. Here are the settings I can modify:
http://codex.wordpress.org/Template_Tags/wp_get_archives
Similarly for other panels/lists.
Is there any graphical interface to change such settings, avoiding the need to modify the php files in themes directory?
Suppose for example that I want to change the archive list type from monthly to yearly: can I use a graphical interface or not, working whatever theme I'm using?
Is there any plugin that does this?
Thanks for your explanations.