/collapse all items)" tabindex="3"
              data-l10n-id="document_outline">
              <span data-l10n-id="document_outline_label">Document Outline</span>
            </button>
            <button id="viewAttachments" class="toolbarButton" title="Show Attachments" tabindex="4"
              data-l10n-id="attachments">
              <span data-l10n-id="attachments_label">Attachments</span>
            </button>
            <button id="viewLayers" class="toolbarButton"
              title="Show Layer