To the right of your Profile Photo and Username on Top of the Community Page, you'll find 4 Icons: the Bell for Notifications, the Envelope for Messages, the Ribbon for Bookmark and the Gear for Config. Click on the Gear for Config. Go down and click on Edit Profile. It will open your Profile to make changes. Below the Edit Profile, click on the Notification Preferences. Uncheck all the boxes. When done, click on the Green Save Preferences button to save the changes you made.
If I click on the gear there are 2 tabs for view profile and 1 for sign out. Nothing for edit profile. This is more trouble than its worth! How do I cancel?
I am sorry you didn't find the Edit Option from the Config on the Community Page. Below is the ScreenShot of what I was referring to, which Yeti's Peace Sign is pointing to. Another way of getting there is with the Green Icon that Sukanta pointed out.