BubbleSizes is an option to BubbleChart and related functions that specifies the range of sizes used for bubbles.
ButtonBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for cells that specifies settings for buttons within the cell.
ContentSize is an option for Manipulate and other functions that specifies the size of the content area to use.
ControlPlacement is an option for Manipulate, TabView, and other control objects that specifies where controls should be placed.
ConversionRules is an option for Cell that can be set to a list of rules specifying how the contents of the cell are to be converted to external formats.
ExpToTrig[expr] converts exponentials in expr to trigonometric functions.
Function[body] or body & is a pure function. The formal parameters are # (or #1), #2, etc. Function[x, body] is a pure function with a single formal parameter x. ...
HelpBrowserSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for the legacy Help Browser.
LimitsPositioning is an option for UnderoverscriptBox and related boxes that specifies whether to change the positioning of underscripts and overscripts in the way ...
Line
(Built-in Mathematica Symbol) Line[{pt_1, pt_2, ...}] is a graphics primitive that represents a line joining a sequence of points. Line[{{pt_11, pt_12, ...}, {pt_21, ...}, ...}] represents a collection of ...