Use Zoom Mode to enlarge the font size of Datablocks, LSK labels, and Tabs. To enable, turn Zoom Mode "ON" in AUX-->Setup-->Display page . Click on image for larger depiction.
In the photo's below, the shading and bubbles are considered delamination, the separation of the sheets that make up the screen. The unit requires service, and extended warranty is highly recommended. Contact your local avionics shop to start the process for sending the unit in for repair.