When doing a job with combined portrait and group images you can switch between taking group or individual portrait images at any time using the Group or Individual radio buttons in the Control pane.
Take each image as described in the portrait or group sections. However the printing of the order forms will be slightly different; if the group image is taken first the order form will be printed as soon as each portrait image associated with that group is taken. If, however, the portrait image is taken first then the order form will not be printed until the group image associated with the same group has been taken and then all the order forms for the associated portraits will be printed. At any time you can click the More button to check which portrait and group images you have taken, have not yet got their associated image (and therefore not had order forms printed). See Report Unmatched in More Controls.