Update August 2019: in newer versions of Windows 10, you can increase only the text size in the new 'Make text bigger' option:
Settings > Ease of Access > Vision > Display > Make text bigger
!['Make text bigger' option](../../I/static/images/4fc7730f1098dd738cec6513f1361270f2d70a218541fe8105f759fdd0ae6b16.png)
Settings > System > Display > Change the size of text, apps and other items
You can adjust the size there.
![](../../I/static/images/5aed561827817e8956d5f59a72a54771a08f1cc359a618abb536f50d3b1400a3.png)
Or if you want to specifically choose what you want the text size to change for, go to Control Panel > Appearance and Personalisation > Display > Make text and other items larger or smaller.
Here you can change the font size of title bars, menus, message boxes, palette titles, icons or tooltips:
![enter image description here](../../I/static/images/dd4a3162d1a4b33f42e2829cfd42eb56306753d64122efe2032f641c6952aa26.png)
Here explain how to create a custom DPI, http://windows.microsoft.com/en-us/windows7/make-the-text-on-your-screen-larger-or-smaller?v=t
– gonzalon – 2015-08-20T07:40:38.983Found answer to this question, but it's locked by http://superuser.com/users/73918/dragonlord so I can't add it
– Korayem – 2015-09-22T10:04:59.567