Apologies but can't seem to find your picture on my screen
Terry has to go out. Asked that I help you in his place.
OK With Qimage open on main screen, click on EDIT (Top left)
Then click Preferences, the first one, Printing Options.
See attached
Now in the lower center of the box that opens, you will see,a section where to set to RAW. That is for larger prints.
Holler if you need more help.
Sometimes I do too.
Fred