Hi Damian, Does Oxygen issue any warning when opening the file? For example does it report that it has very long lines or some special characters inside? In the Oxygen Preferences=>"Editor / Open" there is a "Support for special characters" setting, if you set it to "Disabl...

Hi Radu I have tried suggestions: restarting Oxygen, restarting computer, Disable support for special characters in preferences. The strange thing is it runs OK for a while (never been snappy), but then every now and then, seems to be after opening an xml document larger than about 1 Mb, it becomes ...

I am also experiencing very poor performance from Oxygen. Trying open 271Kb xml document takes extremely long or just doesn't load. Have to open xml up in another text editor which happens virtually instantly. When deleting sections of content using the the outline palette, after deleting a few (may...