Windows Snipping Tool is great for taking a screenshot of one part of your screen. Useful when you are want to add an illustration to a document.
However, if you need to capture a drop-down or pop-up menu they disappear when you click on the New button to start the selection. There is a way around this using the Delay option built into Snipping Tool. Watch the video to find out how.
Delay tends to be the most reliable way to do this. However, there is another method you might want to try:
Snipping Tool is being replaced with Snip & Sketch, here's a video on how to do this same using the new tool.