Change The Font Size or Color Across All Visuals and Pages in a Power BI File

You can change the font size of a visual easily by going to the format option of that. However, if you want to change it for multiple visuals, better to use Themes for it. Recently Power BI Desktop came up with some easy-to-use options to customize your theme. That means you can now easily increase the font size for your Power BI file (all visuals, and pages) with just a few clicks. no need to worry about JSON files etc. This is what I am going to explain in this post.

Download the Most Recent Version of Power BI Desktop

If you already don’t have the most recent version of Power BI Desktop, then download it. In the Help tab, under About, you would be able to see what is your current version of Power BI Desktop;

If you have installed the Power BI Desktop app from the Microsoft Windows Store on your Windows 10, then it gets automatically updated.

Enable the Customize Theme Feature

As of right now, the customize theme feature is a preview feature, and you should enable it, by going to File -> Options and Settings -> Options, and then under Preview Features, make sure you select that option;

Note that, this feature will be out of preview and generally available probably in the next few months after the publish date of this article, so you might not need this step of enabling the preview feature anymore if you are visiting this post in the future.

Another preview option I recommend to enable is the Update Ribbon, that way, you can see the Power BI desktop with the new layout (similar to the screenshots of this post).

Customize the Current Theme

After setting up the preview features (and re-starting the Power BI Desktop), you can go to the View tab. Here is where you can choose a different theme, or even customize the existing one:

The Customize theme windows is a very simple configuration window, you can go to the Text tab, and configure whatever you want. There is much more than just text in the theme, like colors, and other stuff. make sure to check those out too.

for some of the reports that you have created previously with the default or custom theme, you might see an error saying that this setting cannot be applied on those themes, you can then select another Theme from the list, and would be able to continue with the text formatting. Here you can see all the font sizes changes in my report with this configuration;

Here is a look at how you can change colors too;

Re-Use your Theme

As you see it is easy to set up a theme. However, it is also easy to set up inconsistent themes in each Power BI file. My recommendation is to set it up in one file and then export it. This will give you a JSON data type file.

And then in other Power BI files, you can just Browse for that theme. It is good to keep that theme in a shared folder that other Power BI developers have access to it too.


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Reza Rad
Trainer, Consultant, Mentor
Reza Rad is a Microsoft Regional Director, an Author, Trainer, Speaker and Consultant. He has a BSc in Computer engineering; he has more than 20 years’ experience in data analysis, BI, databases, programming, and development mostly on Microsoft technologies. He is a Microsoft Data Platform MVP for nine continuous years (from 2011 till now) for his dedication in Microsoft BI. Reza is an active blogger and co-founder of RADACAD. Reza is also co-founder and co-organizer of Difinity conference in New Zealand.
His articles on different aspects of technologies, especially on MS BI, can be found on his blog:
He wrote some books on MS SQL BI and also is writing some others, He was also an active member on online technical forums such as MSDN and Experts-Exchange, and was a moderator of MSDN SQL Server forums, and is an MCP, MCSE, and MCITP of BI. He is the leader of the New Zealand Business Intelligence users group. He is also the author of very popular book Power BI from Rookie to Rock Star, which is free with more than 1700 pages of content and the Power BI Pro Architecture published by Apress.
He is an International Speaker in Microsoft Ignite, Microsoft Business Applications Summit, Data Insight Summit, PASS Summit, SQL Saturday and SQL user groups. And He is a Microsoft Certified Trainer.
Reza’s passion is to help you find the best data solution, he is Data enthusiast.

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