Unfortunately there are some weird timing bugs in Octave's plotting interface.  Also, there could be an interacting with the windowing system.  Sometimes, Octave makes a change but the windowing system is flagged that it needs to update.

Is there something else we need to do to make this behave like the position property?  This code does work for me:

set (figure(), 'units', 'normalized', 'position', [0 0 1 1])

while this does not

set (figure(), 'units', 'normalized', 'outerposition', [0 0 1 1])

After some more playing with 6f6b5f2e5d4d I see that after I
execute the set() command I get a default figure that gets blown up full screen after some short but noticeable delay.
But sometimes it stays at the default size.

Dmitri.
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The patch doesn't work for me (hg id: 6f6b5f2e5d4d).  The figure is the same old small size as if I had not specified an 'outerposition' value.

Running `figure('units','normalized','outerposition',[0 0 1 1])` should generate a fullscreen figure but it doesn’t - just a default size figure.