Proximity- to be close to something, or near it. Elements that are close together are perceived better than elements that are farther apart.
You have to have a reason for putting an object next to another in terms of marketing. Is it appealing to the eye ? does it go with the topic?
-Proximity in a design will usually overwhelm competing visual styles
- A example of good proximity in design is a keyboard. Everything is grouped together, Letters, numbers, functions...
Alignment- to make it visually pleasing to the eye, you have to make objects unified in a line. For example text.
- you want to have a strong visual line in your design either line up your design to the left or to the right. Making everything center is a weak design even though it is a natural thing to align things in the middle.
Contrast- making different parts of your composition stand out. You can do this by changing the color of your font.