According to Lisa Graham of Basic of Design book:
Emphasis, Contrast, Balance, Alignment, Repetition, Flow
According to Robin William of The non-designers design book:
Contrast, Repetition, Alignment, Proximity
Texture, line, color, shape, space, typography, scale


Designed Principles for artist:
Balance, Gradation, Repetition, Contrast, Harmony, Dominance, Unity,
According to ACA certification prep basics the design principles are:
emphasis, symmetry, contrast, movement, color theory, rule of thirds, balance, white space, proximity, unity, alignment, &repetition
According to ACA certification prep basics the design elements are:
Lines, shapes, and texture
Design principles list:
emphasis, contrast, balance, alignment, repetition, flow, proximity, gradation, harmony, dominance, unity, symmetry, movement, color theory, rule of thirds, &white space.
Design elements list:
texture, line, color, shape, space, typography, scale, &texture
Definitions:
Emphasis: Making a specific element stand out. Used by achieving color, size, location, or shapes.

- making it bigger, boldest, &brightest.
- stetting type in bold or italic or both.
- adding a special visual effect to the element
- placing he element in a shape that is different from the other graphics or text on the page.
- adding a border to the shape around the element.
- using a contrast color
- surrounding the element with lots of white space.
- adding a drop shadow.
- tilting it at an angle when other elements are horizontal.
Contrast: Comparing and creating differences.

- placing very small elements on the page with very large elements, such as small type with large type or small images with large images.
- all capital letters next to all lowercase letters
- thick type or lines with thin type or lines.
- warm colors with cool colors.
- vertical columns of text broken by intruding strong horizontal elements.
- black type and light gray type.
Balance: The page is laid out in a planned and coherent visual pattern. Visual elements are not out of proportion or heavy in one area.

- using black shapes, solid backgrounds, or rectangles with white type reverse out.
- try thick rule lines in gray, thin rules lines in black.
- use gradations from white to black in rule lines, in type, in shapes, in the background.
- try photographs and illustrations with a wide range of gray tones.
- use plenty of white spaces.
Alignment: The space of text and graphics in relation to one another of margins on a page.
Repetition: Repeating an element to create visual consistency.

Flow: The visual and verbal path of movement that a viewers eye follows through a page or sequence of pages.

Proximity: The closeness of distance from text and graphics.
Movement: Directing the eye in a certain direction.
Pattern: A repeated decorative design.
Rhythm: A strong regular, repeated pattern of movement or sound.
Variety: The quality or state of bing different or diverse.
Unity: Creating a feeling of wholeness.
Symmetry: When the composition of the text and graphics is evenly distributed around a center point.
Color theory: The idea that colors can affect human thoughts and emotions.
Rule of thirds: The theory that the most interesting components of a composition, like a web page, is found off-center.
White space: Areas of the page that do not have text or graphics.