We can also add drop-down menus to our HTML forms. We can use the select element to implement these drop-down menus. Input choices are in “option” elements as shown in the example below. Code ...

Add the drop-down menu code in the "Layout" section when you want to include it on all your blog's pages. Select "Add a Gadget." Choose the "HTML/JavaScript" option.

Although the gadget does not include an option for configuring the display of categories in a drop-down menu, you can achieve this effect by editing the HTML of your blog design.