notebooks - How to set default magnification for all windows

This is certainly a newbie question but I could not find the answer by searching.

I am using Mathematica 8 under Windows 7. I want to use default magnification of 150% for all notebooks and help files which I open in Mathematica. At present I have to do it through Windows->Magnification for every single document I open which is of course tedious. I assume there is a way of setting some options which is saved across different sessions as well.

Would appreciate any help.

Answer

If the reason you ask is because the fonts are much too small, then there is another approach that is arguably more correct than changing Magnification, and that is to specify a better screen resolution. By default it is 72ppi, but screens haven't been like that for years (mine is about 100ppi).

SetOptions[$FrontEndSession, 

 FontProperties -> {"ScreenResolution" -> 96}
]

If you like the setting and what to make it persist between sessions, replace $FrontEndSession with $FrontEnd.

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