Quoting from chapter 23 of BW help:Verse and Chapter Notes
The Verse Notes and Chapter Notes status areas deal with user-defined notes. You can configure BibleWorks to maintain user-defined notes automatically for each verse or chapter. Separate sets of files are maintained for chapters and verses. At any given time you can have either chapter or verse notes loaded automatically into the BibleWorks editor whenever the verse in the Browse Window changes. Only one mode can be active at a time. Or you can turn the feature off entirely. The Verse Notes status area will be grayed out if Verse Notes are turned off. The Chapter Notes status area will be grayed if Chapter Notes are turned off. Only one of these two can be active at a given time. Double-clicking on either status area will turn auto-loading on for the note set in question. The V and C status areas indicate whether or not notes have been saved for the current Browse Window Verse. If they are grayed out no notes exist. These indicators work even if you have both Chapter Notes and Verse Notes turned off.You set these options on or off using the check boxes of the "Main Window Status Bar Configuration" section of the BW Options Window, Flags.
So you only have to glance at the status bar to see if there are Verse or Chapter notes for the current verse/chapter. This means you don't need to waste screen real estate on a permanently open Notes window.
By the way, I keep all parts of the status bar turned on, both for the information it carries and for the ability to easily change settings -- I use it most for toggling Strong's numbers without having to remember the short cut, or going through the more clumsy options windows.
So, Irvin, this doesn't give you the two notes tabs, but it does tell you when to open which.