You can use bookmarks in Sizzy like in a regular browser.
Bookmarks are tied to Projects and will switch as you switch between projects.
To access them, click on the Bookmarks icon next to the URL bar.
To bookmark the current page, open the Bookmarks popup and select Bookmark Current URL.
Give the bookmark a name, and save.
In order to make changes to a saved bookmark, first you need to click on Edit Bookmarks.
You will be taken to the Edit Project page where you will have an access to all the links saved as bookmarks.
Click on the Delete button in order to delete a bookmark.