On
(Built-in Mathematica Symbol) On[symbol::tag] switches on a message, so that it can be printed. On["name"] switches on a named group of messages.On[s] switches on tracing for the symbol s. On[m_1, m_2, ...
OutputSizeLimit is an option for notebooks which specifies the maximum size in bytes of expressions that will automatically be output in their entirety.
PermutationMax[perm] returns the largest integer moved by the permutation perm.
PermutationSupport[perm] returns the support of the permutation perm.
PixelValue[image, {x, y}] gives the pixel value of image at position {x, y}.PixelValue[image, {x, y}, " type"] gives the pixel value converted to the specified type.
PlotRangePadding is an option for graphics functions that specifies how much further axes etc. should extend beyond the range of coordinates specified by PlotRange.
Pruning
(Built-in Mathematica Symbol) Pruning[image] removes the outermost branches of thin objects in image by setting their values to black.Pruning[image, n] removes branches that are at most n pixels ...
RandomImage[max, {w, h}] gives an image of dimensions {w, h} with pseudorandom pixel values generated from a uniform distribution in the range 0 to max.RandomImage[{min, ...
Refresh
(Built-in Mathematica Symbol) Refresh[expr, opts] represents an object whose value in a Dynamic should be refreshed at times specified by the options opts. Refresh[expr, None] specifies that the value of ...
Regularization is an option for Sum and Product that specifies what type of regularization to use.