Modifiers and Layer Control

Shortcut	Action
`Alt`	Drawing and painting - temporarily switches to the color picker tool
`Shift`	Freehand selection tools - connects clicked points with straight lines
`Shift`	Reverses aspect ratio constraint on scaling
`Ctrl`	Scales from the center of selection
`Alt`	Ignores snapping during an operation
`Ctrl`	Geometric shapes - moves red handles symmetrically
`Shift`	Path text - maintains distance between red handles
`Ctrl`	Path text - moves red handles symmetrically
`Shift`	Pixel brush painting - draws straight line connecting two strokes
`Shift`	Pixel selections - constrains marquee to square or circle
`Ctrl`	Pixel selection - moves underlying layer rather than selection
`Alt`	Pixel selection - removes from selection
`Ctrl`	Pixel tool - erases from current layer or projects
`Shift`	Rotating - constrains rotations to 15 degree intervals
`Shift`	Selecting - scales multiple objects and layers
`Alt`	Selecting - selects object or layer behind current selection
`Ctrl`	Shearing - mirrors shear around center of object
`Shift`	Vector drawing tools - constrains handle angles to 15 degrees
`Alt`	Vector drawing tools - sets node to sharp for creating cusps
`Ctrl`	Vector drawing tools - temporarily switches to node editing from pen

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