But what if you want to be able to edit devices from this table? The process is simple. First, you add a checkbox to the first column of your device list:

<td class="tablevalues" align="left">
<!--Now add your checkbox, defining the list of devices as "deviceNames"-->
<input tal:condition="here/editableDeviceList"
type="checkbox" name="deviceNames:list"
tal:attributes="value device/getRelationshipManagerId"/>
<!--Then the first column contents as above-->
<a...>device</a>
</td>

Now that we can choose devices from the list, we need the controls to edit them. In this case, we'll use a macro defining controls that allow a device to be moved to a different device class. Just add the macro call to the end of your table:

...
</tr>
<!--Add controls here-->
<tal:block tal:condition="here/editableDeviceList"
tal:define="numColumns string:5"> <!--This macro includes the <tr> tag, so we need to pass it colspan-->
<span metal:use-macro="here/deviceListMacro/macros/deviceControl" />
</tal:block>

</table>
</form>