Marian Uhercik

Thank you, Hex. I have uploaded a patched version.
It includes also a handler for 'q' key, according to your proposal.

Daniel Auger pointed out that 4D browsing isn't actually working. Taking a closer look I found a bug around line 100; changing the code to

handles.axis_equal = 0;
handles.color_mode = 1;
if (size(volume,4) ~= 3)
   handles.color_mode = 0;
end;

fixed the problem (it used to be 'if size ~= 3, color_mode = 1, end' which is obviously wrong...).

This is still a tool I like and use a lot!