Chapter #14. Don't Use a Drop-Down Menu If You Only Have a Few Options
A drop-down menu in the user interface is designed to expand when clicked and present a range of options. This is fine for country selection or customization, where there genuinely are lots of options.
There is, however, an overhead to operating a drop-down menu: the user needs to click to open, scroll to the correct item, then click to select. On a mobile device this can be even slower, as the user will be using a smaller screen.
If you only have two or three options, then don't jump to using a drop-down straightaway. Consider the options could be better presented to users with a different kind of control (radio buttons, sliders, and so on).
Sort your options into a sensible order—alphabetical or numeric—rather than random. Don't be the app that asks users to select a floor of a building in alphabetical order: "First, Fourth, Ground, Second, Third." Yes, I've seen this!
Very long drop-downs—for example, country selection...