You can also save one in your initial working directory (startup directory). Pro/E will automatically read this config.pro file on startup and apply those settings. That way if you ever re-install Pro/E you will not loose your config.pro.
The previous technique will affect all parts/assemblies each time you bring them into a session of Pro/E. You may find it necessary to control these notes individually. For instance, there may be a dozen notes within the *.prt/asm and you need to see only 2 or 3 of them. This can be done within the model tree.
Note the highlighted hole feature (Hole id 151) in the added view and it is expanded to show a note. By RIGHT clicking on the note in the model tree a submenu appears with 6 options (Move, Erase, Delete, Text Style..., Modify, & Info). Select Erase and the note will disappear on the screen. RIGHT click on the note again and the submenu shows 4 options (Show, Delete, Modify, & Info). Select Show and the note will reappear on the screen.