Large outputs are automatically shortened. You can use the controls in a shortened output to show more or less of the result:

To set the size limit above which large outputs are shortened, click set size limit... in a shortened output or choose and select the Advanced tab. Enter the limit in bytes of the size of unshortened expressions:

• The size limit refers to the number of bytes in the typeset form of the expression. An expression expr is shortened if ByteCount[ToBoxes[expr]] > size limit.
• The size limit is stored in $OutputSizeLimit, which you can set directly; for example, $OutputSizeLimit=200000.

Use Iconize to create an iconized form of an output:

Copy and paste the output to use the iconized form in other expressions:

Give an iconized expression an explicit name:

You can specify the approximate number of lines to display in an output using Short:

• Short affects only the displayed form of the output. The result itself is not shortened.

Shorten long text outputs using Snippet:

You can limit the expression depth displayed in an output using Shallow. Here is the tree structure of a nested expression:

Shallow chops branches of the expression tree that are at the specified depth:

• Shallow affects only the displayed form of the output. The result itself is not shortened.