Lines:

• In the world of UX design, lines can be used to differentiate sections of an app, connect two related ideas, or add emphasis to certain parts of the design.
• For example, you may choose to place a line below header text to draw additional emphasis to titles.

Size:

• The size of an element is in relation to other elements and factors that affect the design.
• Size is an especially important consideration when designing an app for a mobile phone screen size, which is pretty small.
• The size of elements can determine how users experience your design, for better or for worse.
• For example, a button that's too small can frustrate users or cause them to tap the wrong part of your design.

Image:

• In UX design, images are used to tell stories, make an impact without words, and add visual emphasis.
• Images can be static, like pictures and illustrations, or moving, like animations and GIFs.
• Either way, you should include images that are relevant to the story you want to tell with your design and that are relevant to the users you're designing for.
• For example, if your app for home repair services is addressing a specific problem that many users face, like a clogged gutter, it might be effective to include an image of a clogged gutter in your designs to drive emotional impact.

Putting it all together

Visual appeal:

• Consider how the content of your designs will be experienced by users in the real world.
• Are your lines connecting or dividing the right design elements? Are any shapes accidentally overlapping? Did your image upload correctly to Figma?
• You'll want to review your work with a heightened attention to detail, specifically looking for elements of your designs that might not be the most visually appealing.

Accessibility:

• As you design mockups, think about how users with various accessibility needs might react to the elements you include.
• For example, do headers stand out from the information placed below, by using lines or another visual design element? And, do all of your images have alternative text?
• Ensuring that your designs are accessible for everyone is critical to making your work a success!