Notifications are disabled, sorry. In the past there was one particular thread with so many subscribers that the web hoster considered the amount of mails sent because of that thread alone spam. Wasn’t even really absurd amounts, spam-blacklists apparently are quite sensitive these days…
As far as your issue is concerned:
In immersive screen mode you can adjust size and distance for pretty much any potential need after clicking the ‘more immersive screen settings’ button.
For EdgePeek there is an ‘EdgePeek distance’ setting on the image page of the menu (may require expert settings enabled in the config app).