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| Chapter 12 Nroff and Troff |

## .ev

    .ev [n]

Change environment to `n`. For example, many requests that affect horizontal position, hyphenation, or text adjustment are stored in the current environment. If `n` is omitted, restore previous environment. The initial value of `n` is 0, and 0`n`2. You must return to the previous environment by using .ev with no argument, or you will get a stack overflow.

Reference: .eo |  | Reference: .ex