Figure 6 displays prompt information both inside and outside the check box, clearly informing the user how to proceed to the next step. For example, the drop-down arrow indicates that the user "click to view all options", and the prompt above informs the user why he/she chooses the country. 3. In fact, if you are not sure which option most (about 90%) users will choose, Country Email List you should not use the default option, especially if this information is required. The reason here is that if you provide options that are filled in by default, you are also likely to provide options that the user doesn't really need, and the user is also likely to browse too fast and not notice that some information has been defaulted. filled out. So in most cases, it's safer to warn the user that a question is missing, rather than provide them with a possibly wrong default option. 4. Selection menus and mobile devices Josh Brewer once said: Mobile devices magnify all usability problems. Using a pull-down selection menu may not be a bad choice on a computer browser, but on a mobile device, it can cause a lot of problems, and even the context of the selection menu itself cannot be rendered. Mobile devices have limited screen real estate, which means you have only a small area to display the context of your information. Even though this information can be swiped up and down, it means that users will take more time to navigate and navigate options on mobile devices than on desktop browsers. Drop-down lists always present a lot of problems, and while there are many simple and appropriate controls on mobile devices, designers often lack appropriate choices in the design of select menus. A bad example is to make all select menus They are all expanded in a drop-down list (Figure 7 left). Figure 7 Left of Figure 7: The entire input process is a drop-down selection menu, which is too verbose and bland; Right of Figure 7: Corresponding input methods are provided for each question and option. Difficulty 1: Filling out a form can take many steps Completing a series of selection menu entries on a mobile device is often a multi-step process and can be too labor-intensive for the user. Taking Figure 8 as an example, completing such a filling process requires many steps, including multiple clicks, swiping up and down to view, and finally confirming and clicking options.