You can use the entries in the password database as follows:

Select the required entry in the list.

You can then use the following key combinations:

• Ctrl-C: Copy password to clipboard
• Ctrl-B: Copy user names to the clipboard
• Strg-U: Copy URL (web address) to the clipboard
• Ctrl-Shift-U: Open URL in the browser.

Alternatively you can also use the corresponding buttons:

If you prefer to control the filling out from your browser, you will need browser extensions for KeePassXC (in german).