To highlight on the website, select text with your mouse. A popup will appear that contains an icon that looks like a feather pen. Click this and you've made a highlight! To remove the highlight, simply click on it and the popup will reappear. This time, select the icon that looks like a feather pen with a slash through it.
To highlight in our mobile apps for smartphones and tablets, first tap firmly on a word. Then, drag the cursor on either side to select the text you'd like to highlight. A popup will appear with the option, "Highlight." Tap on this and you've made your first highlight! To delete a highlight, simply tap on it and the menu option will appear with an prompt to delete it.
Please note: it is not possible to highlight the supplementary quotes between blinks, nor is it possible to highlight the titles of the blinks.