mdb provides a built-in output pager. The output pager is enabled if the debugger's standard output is a terminal device. Each time a command is executed, mdb will pause after one screenful of output is produced and will display a pager prompt:
>> More [<space>, <cr>, q, n, c, a] ?
The following key sequences are recognized by the pager:
Display the next screenful of output.
Abort the current top-level command and return to the prompt.
Continue displaying output without pausing at each screenful until the current top-level command is complete.
Display the next line of output.
Quit (abort) the current dcmd only.