Customers whose Yoga 13 with preinstalled Windows 8 or upgraded to Windows 8.1 may see blurry text on their screen which could be very uncomfortable to some customers.
There are many discussion all over the internet in regard to this matter. While we are waiting for Microsoft to address this issue, the problem can actually be resolved by changing some settings below.
Go to "Desktop" mode.
Right-click on "Desktop" and select "Screen resolution" option.
Now click on "Make text and other items larger or smaller" link.
A"Display" settings page will be opened. You can also directly open "Display" window by selecting "Personalize" option from Desktop context menu and then click on "Display" link given at the bottom of left-sidebar.
Enable "Let me choose one scaling level for all my displays" option and apply the changes.