The principles of design are the thinking behind what you put on the paper

Dominance is a principle of design. 

• some elements more important
• one is overpowering the other
• visual weight of the element
• the one that stands out
• dominant = one in foreground with most visual weight
• sub-dominant = the secondary object
• subordinate  object = little visual weight, background

Christ the Redeemer has dominated Rio de Janeiro skyline  for 80 years

Meanings can be attached to dominance

• is the focal point
• the centre of interest
• point of importance

• Learn more here

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