Usable font size can be increased up to 3x via mouse, or up to 6x via keystroke. Enlargement past 6x, while possible, causes text lines to become chopped off from view. Font size settings do not alter the TOC font, however.
Change background and foreground color
The reading system provides completely customizable text color and background choices.
Brightness setting is only available within the operating system. The reading system does not provide its own setting.
Apply high contrast system configuration
Neither the reading system interface nor the book content respects the high contrast mode set by the OS. Applying the high contrast setting in the Windows control panel does not carry over to the reading system. It is completely ignored.
Magnify the User Interface(UI)
Reading system works as expected with standard magnification viewers. Tested with Windows Magnifier (available in the OS) and also ZoomText.
There are over 100 typeface options available, which include both sans serif, serif, and monospace font styles.
Support for SVG
Enlarge SVG image
Using the font zoom feature in the reading system does not alter the size of an SVG image (unlike other image types), but one can use a right-click on the image to bring up a pop-up image viewer which can magnify and manipulate the image.