I didn't think there was a level requirement for the minibar to be customized. There should be a small green plus icon in the bar, when you hit that the site should present you with a popup Ajax menu to add the current page as a bookmark.
Okay having just now discovered the mini-bar configuration page at »/prefs/minibar/config has more controls than the mini-bar configuration iconed on the mini-bar itself I see that the mini-bar function is more capable than I originally thought.
For what it may be worth I did not see the green plus icon until I changed the mini-bar location from 'old' to 'top'.
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I see that the mini-bar function is more capable than I originally thought.