Which technique is NOT recommended for enhancing page design?

Using a single font throughout a design can lead to a visually uninteresting and monotonous appearance. While consistency is vital in web design, relying exclusively on one font can limit the ability to effectively communicate different types of content and can make a page less engaging. Effective page design often involves a strategic use of multiple fonts to create a hierarchy, emphasize certain information, and enhance readability. For instance, combining different font styles for headings, subheadings, and body text can help guide the reader’s attention and create a more dynamic visual experience.

In contrast, the other techniques listed, such as using contrasting backgrounds, colored fonts, and appropriate font sizes, are all recommended because they help improve the overall readability, aesthetic appeal, and user experience of a webpage. These techniques allow for creative expression and can effectively convey the content's message when used thoughtfully.