more displays the content of a file page by page on the standard output.

more gaussian.log

If displaying needs several pages, more automatically stops at each page.

more command meaning
Space display the next page
Enter display the next line
q quit
/string search for the next occurence of string
n next occurence of the current search
? help

One of the main problem of the more command is backwards display (=browse up in the text).

To the opposite of more, the less command is a better version which uses the keyboard arrows to navigate in the file.

It is strongly recommended to use less instead of more.