Go to your portfolios, select the "Summary" tab, and scroll towards the left, you will see an option to add a note, for each stock in your portfolio. This feature is currently for Premium and Pro subscribers only.
Tap on that to add a note and then save it.
All saved notes can be accessed together, and edited, in the 'My Notes' section.
Please email us at subscriptions@seekingalpha.com or give us a call at 1-347-509-6837 if you need any help.
If you haven't subscribed to Premium yet, you can unlock access to our subscriber-only features by signing up here.