CurrentImage[] returns the current image captured from a connected camera.CurrentImage[n] returns n sequential image frames as a list.

DivisorSum[n, form] represents the sum of form[i] for all i that divide n.DivisorSum[n, form, cond] includes only those divisors for which cond[i] gives True.

Epilog is an option for graphics functions that gives a list of graphics primitives to be rendered after the main part of the graphics is rendered.

GrayLevel[level] is a graphics directive that specifies the gray-level intensity with which objects that follow should be displayed. GrayLevel[g, a] specifies opacity a.

ItemAspectRatio is an option for GraphicsGrid which specifies the ratio of height to width for the regions in which items are placed in the graphics grid.

Larger is a style or option setting that specifies that objects should be larger.

LayerSizeFunction is an option for TreePlot that gives a function to specify the relative height to allow for each layer.

LineSpacing is an option for Style and Cell that specifies the spacing between successive lines of text.

LocatorRegion is an option for Locator that specifies where the locator object should by default be allowed to go when it is dragged.

PageBreakAbove is an option for Cell which specifies whether a page break should be made immediately above the cell if the notebook that contains the cell is printed.