Coincidentally, I got two emails from different users that asked almost the same question.
Basically the questions amounted to gathering 6 or more images in the queue to be printed. But not at that moment. Wanted to look for more that fit the topic, or just later..
Both took the path of saving the job for later. That worked fine until they had gathered 4 more from various folders and wanted to add them to the saved job.
OOPS! Loading saved job clears the queue. Lost the 4 new ones.
How to do it the Qimage way. USE ON DECK.
Simply right click on either the thumbs or images in the queue, and select PLACE ON DECK. Your image (s) will be placed on deck to be quickly retrieved when ready.
Click the green dot to enter ON DECK. Read the balloon for left click and right click.

Many newcomers may have never seen this feature, but it sure comes in handy.

Fred