Sometimes a webpage asks you to make a choice using a dropdown menu. This is a box with a downwards arrow next to it. The one on the right is just a picture to demonstrate what it looks like. It's not a real drop-down menu.
When you click on the arrow, a list 'drops down'. Click on a line to choose your option and it will appear in the box. If you have made your choice, and nothing seems to be happening, click on the nearby button called something like 'Go', 'Do it', 'Send' or 'Submit'.
Sometimes, the list is so long that it has a little scroll bar of its own. If you can't see what you want, scroll down using this bar until you find what you want, and then select it as above.
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