# Keeping Text Size the Same Throughout Entire Notebook File

Is there a way in which when you choose to format the size of the font within your notebook, for a particular cell, when you go into another cell, the default size font (12pt) will not be re-activated. I want the font size to stay constant throughout the entire notebook, until I go back and need to manually change it by hand.

Example:

Format -> Size -> 16 Point

There are a variety of ways to do this. One can use Stylesheets as noted by acl. Perhaps the most direct way is this:

For one Notebook:

SetOptions[EvaluationNotebook[], FontSize -> 16]


For all Notebooks:

SetOptions[$FrontEnd, FontSize -> 16]  You can also set FontSize for different Box types, such as GraphicsBox: SetOptions[$FrontEnd, GraphicsBoxOptions -> {BaseStyle -> {FontSize -> 15}}]


If you are more comfortable with a GUI, all of these options are available through the Options Inspector in the Format menu.

If you decide to go the advanced route and use style sheets here is a guide to get you started:

David Park's StyleSheet creation notes (.zip file)

Depending on your goals, this question may also be of interest:

How to set default magnification for all windows

• good point, more direct if less general
– acl
Feb 18, 2012 at 23:44
• Mr. Wizard. Thank You so much, this works perfect. One thing, you forgot to add the s to the end of Option for the first two dealing with the notebooks. Feb 19, 2012 at 0:31
• @nightowl I'm glad I could help. I rely heavily on spell-check and I was typing that from memory. Thanks for the catch. Feb 19, 2012 at 0:41
• OK, so none of this seems to work. I am running Mathematica 11.0.0.0 I am running the standard notebook. SetOptions[EvaluationNotebook[], FontSize -> 16] -- Does nothing. What is this supposed to do? Change the font size in all the boxes immediately? Change the font size in all future boxes? SetOptions[\$FrontEnd, FontSize -> 16] -- Has no discernable effect, either to the current notebook, or to any others that I open, or after I restart Mathematica. Format menu => OptionInspector=> Font size (by search). There is no pull-down next to FontSize, and changing the number (13) directly undoes as s Apr 17, 2018 at 1:23
• None of the suggestions seems to work for me either: MMA 12.0 on Mac OS 10.11.6. Does anyone know why these suggestions don't work, or how to do this? Jun 4, 2019 at 2:54