You can highlight texts in Note in the following way.
<Desktop>
1. Select texts you want to highlight and click “Highlight” icon in the lower of Note.

2. Select a color, and the texts will be highlighted.

<Mobile>
1. Select texts you want to highlight and tap ” A” icon in the tool bar.

2. Tap “Highlight” icon.

3. Select a color, and the texts will be highlighted.


