This is not exactly a feature request but also not a bug. But since it's an improvement I chose to tag this issue as feature request.

In Kleopatra when you open the settings for Kleopatra there are some settings where it is not clear what you can enter and how you have to format it. For example there is the setting where you can tell GnuPG how to retrieve keys (in German: "Benutze MECHANISMEN um Schlüssel über die Mailadresse aufzufinden."). Next to it there is an empty input field.

The problem is that users don't know which options are available so they have to search the documentations to find the possible options. That's not nice because it's not comfortable and could be easily done different. Even for advanced users it could happen that they just forgot one option and only because of that would have to consult the documentation.

The second problem is that users can't be sure of they entered the options right. Do you have to enter the mechanisms separated by a white space or a semicolon? Does Kleopatra allow different kinds of formatting?

This problems are valid for a few other settings in the settings as well but they could be solved easily. You just could use check boxes so users could enable single mechanisms (or other options). It is not necessary to show these options right away. Users could click on the input field to open a small popup with the options for example.