This is in continuation of this closed thread, updated for 3.9 : https://moodle.org/mod/forum/discuss.php?d=238979
By default, if a quiz has a small number of questions (I believe the minimum number is 25) , all the questions get displayed on one page during review, with a link for 'Display one page at a time'.
I wanted to make the display default to one page at a time. This is the solution :
Go to mod > quiz > review.php
Within the top few lines, find this line :
$showall = optional_param('showall', null, PARAM_BOOL);
Change the null to 0. Like this :
$showall = optional_param('showall', 0, PARAM_BOOL);
Now the review display will be the same number as the quiz display. (Same number of questions per page.)