Reported as the CODE128 not appearing in the preview. It was appearing, in 44
of the 45 preset and layout combinations swept - as a 36 pixel stub. The code
box and the caption were both allowed to grow, so a caption of any length took
half the label and then kept taking, and on 1.00 x 0.50in stock a few words of
caption left a barcode too narrow to scan. Present, useless, and indisinguishable
from a failed render. The caption now takes the room it needs and no more, and a
CODE128 holds at least 40% of the label, or all of it when stacked: past that
there are too few narrow bars left to read, and a caption that wraps or clips is
the better trade.
So that a real failure can never again look like this one, an empty code box now
says so in red in the preview. It is screen-only - the marker must never reach a
printed label.
The settings were a narrow column with the preview trailing below them, which
put the labels being adjusted off the bottom of the screen. Settings on the
left, labels on the right in a column that stays in view and scrolls on its own,
folding back to one column on a narrow window.
That scrolling column is a print hazard worth naming: an ancestor with its own
overflow clips a multi-page print to whatever happened to be on screen. Print
resets it, and the check is a six-page two-sided run coming out as six pages
with the label as the only clipping box in the chain.