Thanks for your question.
So to be clear if you open a discussiom - you do not see this button?
If that is the case allow me to bring in a colleague ahw - to take a look at your profile.
Please mark the appropriate replies as CORRECT / HELPFUL so our team and other members know that your question(s) has been answered to your satisfaction.
Don't edit your thread from your inbox.
Instead open your thread in a separate window, for this one e.g. using this link:
hope this helps