A:Answer Making assumption that this is an earlier Chromebook, you might try:
Try simultaneously pressing CTRL and Shift and + (addition sign) keys OR CTRL and Shift and - (minus sign) keys,
OR
Go to Settings and then Search on Display and adjust "Display Size" or Search on "Font" and adjust the font size or customize the font
OR
On the Chrome tab settings, adjust the "Zoom" option
If you're running an older Chrome OS version, then you might also try updating your OS and then trying the above. To force an update, when you're in Settings press the three parallel lines to the left of the title "Settings" and go to "About Chrome OS" and "Check for Updates"
If this is a Windows machine you might try searching on display to see if you can customize.
