Window management in Opal is extremely simple. Opal’s document is an outline. Every document is represented by exactly one window.
Apart from document windows, Opal has just two ancillary windows: the Preferences window (summoned when you choose Opal > Preferences) and the Find dialog (summoned when you choose Edit > Find > Find).
Windows are managed in the normal way. You can zoom a window’s size (Window > Zoom), minimize a window to the Dock (Window > Minimize), bring all of Opal’s window’s in front of the windows of all other applications (Window > Bring All to Front), and bring any Opal document frontmost by choosing its title from the Window menu.
Most operations on a document will cause the document to become “dirty” — that is, the document now has unsaved changes, and the window’s close button has a dot inside it to indicate this. However, certain operations are considered as modifications of your view of the document, and do not make the document “dirty”:
Moving and resizing the window does not “dirty” the document, but window position and size information is saved with the document anyway.
Expanding and collapsing topics does not “dirty” the document, but topic expansion state is saved with the document anyway.
Focused state, filtered state, and view magnification do not “dirty” the document and are not saved.
You can read about the anatomy of a document window.
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