You choose something that interests you - then click the cogwheel icon on the phenology chart.
Say plants - Add Annotations for Flowers and Fruits.
Takes you to Identify where there are keyboard shortcuts (see the keyboard icon bottom left)
Plant and fLower = p + l
Plant and fRuit = p + r
If in doubt, skip that obs.
Or caterpillars?
Life and Larva = l + l
https://forum.inaturalist.org/t/using-identify-to-annotate-observations/1417