Display hidden notes in Drawing views

View > Hide/Show > Annotations.  That will make all hidden annotations visible in a light gray color.  Click on them to make them visible again.  Escape to close the function.

Top tool bar View> hide/show> annotations. ABC with an eyball right before the annotations. Your mouse will have a different cursor choose the notes you want to show and then click escape. For future use I suggest adding a layer to your drawings de-noted as a hidden layer and turn it on and off as needed.

Ok Glenn beat me to it.