When you change the values by moving the slider, you can see the new value in the summary. Step 4: Now, move the slider to change the value to change the font size of the selected item in Windows. Click on the radio button of the preferred option to select that. In this example, I’m going to change the font of the system-wide text this is the text that you see in your files and folder names. Step 3: Next, click on the options whose font size you want to change. You can click on the Theme button to switch between these flat Black and White app background themes. Step 2: This program comes with two types of background colour themes – Black and White. When you run it for the first time, it lets you save the default font size settings. Step 1: Run the System Font Size Changer tool. The System Font Size Changer lets you change the font size of the following six items in Windows. However, you can bring this option back with the help of a small portable utility called System Font Size Changer. With the release of Windows 10 Creators Update, Microsoft removed the ability to change the font sizes of text, apps, and various other items. Windows 10 does not give you the complete control over the font sizes used for its various text elements. Change Font Size in Windows 10 Using System Font Size Changer