Shapes

Result	Action
Sets starting point and opens dialog box	Shape tools + click
Constrains proportion	, , , , or + -drag
Constrains orientation	, , , , , or + -drag
Repositions object while it is being drawn	, , , , , , , , , , or + spacebar-drag while drawing
Changes to minimum/maximum radius	+
Maintains inner radius	+ Ctrl -drag
Creates continuous duplication with mouse movement	, , , , , , , , , or + ~ -drag
Adds/subtracts spiral coils, horizontal grid lines, concentric grid circles, corner radius, sides, star points, or rays/rings	, , , , , , or +
Adds/subtracts coils while increasing spiral length	+ Alt -drag
Changes decay	+ Ctrl -drag
Draws line segment, arc, spiral, grid, polar grid, rectangle, rounded rectangle, ellipse, polygon, or star from center	, , , , , , , , , or + Alt -drag (Alt + -drag to constrain from center)