Additive and Subtractive Color Models

Questions from sheets

Part One:
What is the keyboard shortcut for creating a new document? Command N
What is the size of the image in megapixels: 2480 x 3508 Megabytes: 24.9
What is the keyboard shortcut for the marquee/ellipse tool? M
What key forces the ellipse to be a circle? Shift Key
What is the shortcut to fit the image to the screen? or enter full screen mode? F
What color appears after the images for each circle?
Red: Cyan
Green: Magenta
Blue: Yellow
What is the keyboard shortcut to group layers? Command G
What color are the after images for each circle in the subtractive color model.
Cyan: green
Magenta: red
Yellow: blue

What is the size of the psd file? 1.2mb

Part Two:
What is the keyboard shortcut for opening an existing document? Command O
What is the keyboard shortcut for the paint fill tool? G
What is the keyboard shortcut for the move tool? M
The Blue green and red circles simulate the ADDITIVE color system.

Changing the blending mode to difference simulates the SUBTRACTIVE color system.