Enlarging a contour plot

I just started using Mathematica, and when I entered the following:

Manipulate[
ContourPlot[x^4 + y^4 + 2*x^2*y^2 - x^2 + y^2 == n, {x, -5, 5}, {y, -5,5}],
{n, -.2, 3}]


I got the Plot that I wanted, but it's incredibly small. Is there a way to make it larger?

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It depends on what you mean by size. PlotRange will "zoom", ImageSize produces larger graphic.

For illustration:

Manipulate[
ContourPlot[
x^4 + y^4 + 2*x^2*y^2 - x^2 + y^2 == n, {x, -r, r}, {y, -r, r},
ImageSize -> imagesize], {n, -.2, 3}, {r, Range[2, 5]}, {imagesize,
Range[200, 500, 100]}]


-

Manipulate[
ContourPlot[
x^4 + y^4 + 2*x^2*y^2 - x^2 + y^2 == n, {x, -5, 5}, {y, -5, 5},
PlotRange -> {{-1.2, 1.2}, {-1.2, 1.2}}
], {n, -.2, 3}]


Try also

PlotRange -> All


and

PlotRange -> Automatic


EDIT: You can also do kind of a zoom with Manipulate[]

Manipulate[
ContourPlot[
x^4 + y^4 + 2*x^2*y^2 - x^2 + y^2 == n, {x, -5, 5}, {y, -5, 5},
PlotRange -> {{-xRange, xRange}, {-xRange, xRange}}]
, {n, -.2, 3}, {xRange, .5, 5}]


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