Re: 72 dpi vs actual dpi

*To*: mathgroup at smc.vnet.net*Subject*: [mg66008] Re: 72 dpi vs actual dpi*From*: "Chris Chiasson" <chris.chiasson at gmail.com>*Date*: Wed, 26 Apr 2006 04:38:25 -0400 (EDT)*References*: <e0dtem$rch$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Assuming the monitor is set to the same dpi that windows "renders to", the following workaround from Tom Zeller at WRI should make onscreen Mathematica graphs and fonts exactly the same size as they are on paper. Also, if you use Format->Show Ruler (in ver 5.2), the onscreen ruler will match a real ruler held up to the screen. Take your screen dpi and divide it by 72 to make a machine precision number. In my case, this was 86/72=1.1944444444444444`. Open the options inspector, show options for global, and search for magnification. Paste the aforementioned value into the magnification field and okay everything. You're done. One problem with this workaround is that if you use change magnification later, then you have to manually set the magnification again to get real size fonts, unless someone knows a way to add the custom value to the menu and would like to correct me. Method for obtaining a properly calibrated display dpi under Windows XP: 1. Find your monitor's active display area specs (width, height) and confirm them via measurement. 2. Set a (high) resolution such that the horizontal number of pixels divided by monitor width is equal to the vertical number of pixels divided by monitor height. Write down this ratio; it is the dpi. A higher dpi is usually better. 3. Go to: Display Properties->Settings->Advanced->General->DPI Setting->Custom Setting. Adjust the percentage value until the pixels per inch shown in the display text equals your monitor dpi. Okay everything. Reboot if necessary. Your onscreen text will look strange at this point. 4. Go to: Display Properties->Appearance->Font Size. Choose a font "size" (if they had given real sizes here, this would be easier) that makes the onscreen fonts approximately the same size as they were before adjusting the pixels per inch. 5. If you have an LCD, or just want to try it, launch Microsoft's Clear Type tuning page, presently located at http://www.microsoft.com/typography/cleartype/tuner/Step1.aspx and follow the onscreen instructions, which will probably include installing an ActiveX control to adjust the fonts for you. After everything is done, I recommend rebooting. -- http://chris.chiasson.name/