2.10.12 Options for Graphics Cells
Here is a graphic displayed in a notebook.
Options for displaying images in notebooks.
With the default setting AspectRatioFixed->True resizing the graphic does not change its shape.
If you set AspectRatioFixed->False then you can change the shape.
Mathematica allows you to specify the final size of a graphic by setting the ImageSize option in kernel graphics functions such as Plot and Display. Once a graphic is in a notebook, you can then typically resize or move it just by using the mouse.
Ways to generate animations in a notebook.
Mathematica generates animated graphics by taking a sequence of graphics cells, and then treating them like frames in a movie. The option AnimationDisplayTime specifies how long a particular cell should be displayed as part of the movie.
Options for animations.