Unable to zoom text

For some reason I am unable to zoom in and out on the text. I’ve tried using the percentage drop-down at the bottom, using the mouse keys, the menu at the top, and keyboard shortcuts. All show the percentage at the bottom of the screen changing, but the text remains impossibly small. Please help!

Don’t think I’ve got a solution, but those who do may be helped out by a little more info. Which version of Scrivener are you using? Which version of Windows? What kind of display do you have? I think this kind of thing can sometimes be dependent on interactions with the operating system and hardware.