On the page for the calendar add-on the author posted a picture in which the calender is on the top of the right sidebar and there appears to be a note on the bottom of the same sidebar.
I’ve managed to drag a note into the sidebar but all that does is occupy the whole space. I’m trying to split it horizontally.
And maybe mark your solution by highlighting/bolding it. If the forum allows, you could also check your own post as “solution” so others can see this is a resolved help issue.
Edit: three minutes later I realized that you can drag the icons in the sidebar. Didn’t know you could do that. Not sure if I should delete this or close it for posterity?