BoxFrame is an option for FrameBox objects that specifies whether to draw a frame around the contents of the box.
ButtonFunction is an option for the low-level function ButtonBox that specifies the function to execute when the button is active and is clicked.
CheckAbort[expr, failexpr] evaluates expr, returning failexpr if an abort occurs.
CirclePlus[x, y, ...] displays as x\[CirclePlus]y\[CirclePlus]....
Closing
(Built-in Mathematica Symbol) Closing[image, ker] gives the morphological closing of image with respect to the structuring element ker.Closing[image, r] gives the closing with respect to a range r square.
ColorQuantize[image, n] gives an approximation to image that uses only n distinct colors.
DockedCells is an option for notebooks that gives a list of cells that are to be displayed "docked" at the top of the notebook.
EditCellTagsSettings -> {opt_1 -> val_1, opt_2 -> val_2} is a global option that specifies settings for the Edit Cell Tags dialog box.
Evaluatable is an option for Cell that specifies whether a cell should be used as input to be evaluated by the Mathematica kernel.
EvaluatePacket[expr] is a MathLink packet requesting evaluation of expr.