Use a different aspect ratio:
Background is normally visible only around the edges:
The background "shows through" whenever an explicit entry is
None:
Background also by default shows through for values outside the plot range:
ClippingStyle overrides background color:
The default is to show values outside the plot range in the background color:
Show values outside the plot range in red:
Show low values in blue and high values in red:
Map values from 0 to 1 onto colors according to
Hue:
Use a pure function as the color function:
Use a named color gradient from
ColorData:
Show elements with value 1 as black, and all others as white:
With
ColorFunctionScaling->True, the values are first scaled to lie between 0 and 1:
Specify color rules for explicit values or patterns:
ColorFunction is used if no color rules apply:
The array can contain symbolic values:
Implement a "default color" by adding a rule for

:
Use any patterns in
ColorRules:
Rules are used in the order given:
Reverse the order of rows:
The frame ticks give the original row numbers:
Reverse the order of rows and columns:
Reverse the order of columns:
Use
Epilog to superimpose other graphics:
The graphics can be translucent:
Epilog uses the standard
Graphics coordinate system:
Put frame ticks at round numbers:
Include frame ticks for endpoints:
Frame ticks at specific values:
Frame ticks without a visible frame:
With a mesh included,
Frame->True is required for frame ticks to be drawn:
Make the frame invisible:
Use
MaxPlotPoints to limit the number of elements explicitly plotted in each direction:
Insert mesh lines between all cells:
Insert 15 row mesh lines and 5 column mesh lines:
Insert mesh lines around the first 10 columns:
Use a sequence of colors for the mesh lines:
Insert mesh lines after the first and second rows:
Use
PixelConstrained->True to force cells to line up with screen pixels:
By default cells do not necessarily line up exactly with screen pixels:
Use exactly 1 pixel for each cell:
Use a 2×2 block of pixels for each cell:
Use a 1×2 block of pixels for each cell:
Pick the number of pixels per cell to be as large as possible in the given image size:
Plot only elements with values up to 3, leaving the rest white:
The first two entries in
PlotRange specify the range of rows and columns to include:
With specific plot range

the colors range from white at

to black at

:
Plot positive elements only: