reference to :ref: view_asset-data

Signed-off-by: Victor Garcia Reolid <victor@seita.nl>

documentation/tut/toy-example-expanded.rst

@@ -115,6 +115,8 @@ In the case of the scheduler that we run in the previous tutorial, the PV is not
     :align: center
 |
 
+.. note:: You can add arbitrary sensors to a chart using the attribute ``sensors_to_show``. See :ref: `view_asset-data` for more.
+
 We hope this part of the tutorial shows how to incorporate a limited grid connection rather easily with FlexMeasures. There are more ways to model such settings, but this is a straightforward one.
 
 This tutorial showed a quick way to add an inflexible load (like solar power) and a grid connection. In :ref:`tut_toy_schedule_process`, we'll turn to something different: the optimal timing of processes with fixed energy work and duration.