Hello marginnote team!
This request might be a little niche, but I like to do image occlusion on the pdf document and do recall mode directly on the pdf. Going to emphasize mode and then using the select tool and drawing 2 squares takes too long. Also when going to recall mode, you have to press two times to show the answer instead of one with the highlighter tool. Adding this filled square highlighter could save me a lot of time and frustration. Thanks!