documentationfontsMATLAB
Maybe I'm getting old, but the text in Matlab's built-in help browser is too small for me to read comfortably. It is possible to increase the font size using Ctrl–+, but every time a new help page is loaded, this change is lost
How can I permanently increase the font size?
Go to...
Control Panel > Personalization > Window Color > Advanced appearance settings...
...or...
Right-click the desktop, select Personalize, and continue with the above sequence.
From here, you can change the system-wide font size (on its own) for various things. Changing the Icon font size is the one that affects the Start Menu text.
I realize this question is extremely old (over a year) but I had the same question the other day and after a little bit of testing, figured out the answer.
Instead of this:
<offline_text font="Verdana [14.0]"/>
You should do this:
<offline_text font="Verdana, 14.0"/>
A simple change, but it seems to work.
Best Answer
This has been tested with Matlab R2015a on Linux, but I'd expect it to work on other platforms and maybe earlier versions, too.
Matlab's documentation is in the form of HTML, and the help browser is basically a web browser displaying locally stored files. There are several central style files, but the most important one appears to be
Open this file (as root / administrator) in a text editor, and append the line
Adjust the number to your liking.