Sonarr/UI/Settings/Misc/MiscTemplate.html

<fieldset>
    <legend>General</legend>

    <div class="control-group">
        <label class="control-label">Backlog Searching</label>

        <div class="controls">
            <div class="switch">
                <input type="checkbox" name="enableBacklogSearching"/>
            </div>
            <span class="help-inline-checkbox">
                <i class="icon-question-sign" title="Should NzbDrone try to download missing episodes automatically?"></i>
                <i class="icon-exclamation-sign danger" title="Enabling backlog searching can use a lot of bandwidth and is not
                                                     recommended for users with block usenet accounts or bandwidth restrictions."></i>
            </span>
        </div>
    </div>

    <div class="control-group">
        <label class="control-label">Ignore Deleted Episodes</label>

        <div class="controls">
            <div class="switch">
                <input type="checkbox" name="autoIgnorePreviouslyDownloadedEpisodes"/>
            </div>
            <span class="help-inline-checkbox">
                <i class="icon-question-sign" title="Episodes deleted from disk are automatically ignored in NzbDrone"></i>
            </span>
        </div>
    </div>

    <div class="control-group">
        <label class="control-label">Nzb Restrictions</label>

        <div class="controls">
            <textarea rows="3" name="nzbRestrictions" class="nzb-restrictions"></textarea>
            <span class="help-inline">
                <i class="icon-question-sign" title="White list or black list nzbs based on these rules<br/>White list: +:LoL<br/>Black list: -:French"></i>
            </span>
            <span class="text-area-help">Newline-delimited set of rules in the form of +|-:</span>
        </div>
    </div>
</fieldset>