Some people might have problems reading the text of the icons and menus in Windows Vista. The font size can be too small and making it bigger might help. Windows Vista gives users the possibility to make the text and other items easier to see by making them larger.
This can be done by increasing the so called Dots per inch scale or DPI. To adjust it, just follow the steps outlined below.
First, right click on your desktop and click on Personalize. Alternatively, you can go to Control Panel -> Appearance and Personalization -> Personalization.

In the Personalization window, go to the left pane and click on Adjust font size (DPI).

If UAC is turned on you will need to make an additional confirmation so that the DPI Scaling window will launch. You can choose the default scale of 96 DPI or a larger one of 120 DPI, which makes the text more readable. If these two options are not enough you can click on the Custom DPI button and choose another size (DPI).

In the Custom DPI Setting window you can select the desired percentage for the DPI increase. You have the following options: 100% for the normal size of 96 DPI, 125% for 120 DPI, 150% for 144 DPI and 200% for 192 DPI.

If you set the DPI higher than 96, and you are running Windows Aero, the text and other items on the screen might appear blurry in some programs that are not designed for high–DPI display in Windows Vista. You can avoid this issue by using Windows XP style DPI scaling. Just check the appropriate option and press on OK.

The change can be applied only after a system restart. Close all the running applications, save your open documents and then press on Restart Now. After a reboot, the font size will be changed.
Related articles:
How to change the size of your icons
How to change Window Color and Appearance
Remove the arrow and the "shortcut" text from your Windows Vista shortcuts
Want larger Quick Launch icons in the Taskbar?
How to configure the Screen Saver
Comments
Font Size
I want in simple instructions how to make something I print out larger. Everything I print off the internet I need a magnifier to read. Please help! I have Windows Vista.
Want to change text sizes
Want to change text sizes for different documents; particularly print for web pages as now entirely too smallo
how to change the screen font sizes when the dialog box
pls help me on this ,how can i change font sizes when the dialog box doesn't fit on screen? its too big that it cant project the whole exact thing to do, im slowly being pissed off.
Text and/or window size in Windows mail
It seems since I installed Vista my mail is freaking out. Where the headers are sometimes the text will increase by itself but if I open an email I get a tiny message window with teensy letters I can barely read. Then the text in the message will sometimes increase to a huge size too. At that point the scroll won't work correctly. If I click on an email in the upper window it won't scroll but if I move the cursor down to the preview the upper items scroll and vice versa. Am I losing my mind or has my computer lost HIS mind?!?
DPI window size
Was trying several different DPI sizes and it is now set @ 144.
I want to change it back to previous 120 or so, but the window is
now too large to allow me to click the "OK" button (after I adjust
to a lower number.) What can I do to correct this? Eileen
I've had the exact same
I've had the exact same issue, you have to boot the system in Safe Mode, F8, reopen normally the DPI dialog box, and from there you can easily change back the font size, because the bottom line is showing!
DPI SCALING
I MADE THE DPI SCALE AT 192 AND NOW I WANT TO CHANGE IT TO 144 BUT SINCE THE DPI IS SO HIGH I CAN'T GET TO THE APPLY AREA BECAUSE IT IS OFF THE SCREEN. IS THERE HELP?
THANK YOU SO MUCH IF YOU ARE ABLE TO HELP.
How to change Font Size AFTER the resolution is past 200.....
I made the mistake of setting my laptop to a resolution of 200....and Now the page is WAYYY TOO BIG to scroll down to click "ok" to change the setting back.....HELPPPP!!!
How can I change the setting back when something like This accures.
I've already tried to Restore my comp. back to June 30th of this yr.....and still nothing!!!
Thanks in advance....
Allana
use the keyboard
After you select the setting you want simply press the 'Enter' key from your keyboard. It should work.
this totaly didnt work for me
this totaly didnt work for me it made the font bigger but all the windows are so big i can see every thing in them and cant move the wondow around to see. it would be nice if it just changed the FONT and you could pick the number not just 150% bwcuase that seems to big when 120% is too small.. i hate vista
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