One possibility is to open the detailed project board in a new tab (right mouse click on board in board list). After the board is opened in a new tab copy the URL from your browser address bar.
Go tho your board where all projects are listed and a Link column, paste the URL in the row listing that project in the newly created column. This will give you a hyperlink into the detailed project board.
This would be very useful.
It’s true you can add a URL to the board in a link column, but this is very inelegant and it seems to open the board in a new tab as well. It would be nice to at least have the option to open the link in the same tab.