Wie füge ich Artikel zu einer bestehenden Rechnung hinzu?

The first step is to open <span class="component"><i><b>base7</b></i></span> and click <span class="component"><i><b>Reservierungen</b></i></span>

Click <span class="component"><i><b>10000002</b></i></span>

Click <span class="component"><i><b>Zur Rechnung hinzufügen</b></i></span>

With your mouse, hover <span class="component"><i><b>laden...</b></i></span>

Click <span class="component"><i><b>on</b></i></span>

Click <span class="component"><i><b>Reservierung Rechnungen (1)</b></i></span>

Click <span class="component"><i><b>highlight</b></i></span>

Click <span class="component"><i><b>OK</b></i></span>

That's it. You're done.