You're looking for the 'preferences' text file in the RTW directory. What you need to change is the DISABLE_ARROW_MARKERS:FALSE to TRUE.
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Might as well ask here. Is there any sort of comprehensive list or can anyone just post one up of all the tags that can go at the end of the RTW shortcut and what they do? Also, maybe an example or how to correctly include more than one. I'm talking about the -showerr and other such things as that.
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