Thanks for your question, Robert. There are a couple of different ways to bookmark a community:
1. Once you log in and go to your community y9ou want to bookmark, select the Create drop down in upper right corner (it has a pencil icon beside it). In that drop down there should be the option of Bookmark.
or - and this is my preferred option,
2. I just copy the url into my Favorites bar across the top of my browser.
Please let me know if other questions, and thanks for being part of the Mentor Communities.