You can use the familiar formatting tools that appear on the Home tab near the top of the app window to change the appearance of text in your notes.
Depending on the device you’re using, start by selecting the text you want to format:
Click and drag over the text if you’re using a mouse and keyboard.
Double-tap a word and then drag the selection handles if you’re using a touch device.
If you’re using a mouse, you can rest the mouse pointer over any button and a tooltip description of the command will appear.
To highlight a selection of text without reformatting it, select the text you want, and then click or tap the Highlight button. To remove the highlighting, select the highlighted text, and then click or tap the Highlight button again.
Tip: To remove all previously applied formatting from text in your notes, select the text, and then click or tap the Clear All Formatting button on the Home tab.