Qt Charts caps each axis' layout area at a fraction of the chart size,
so in a dock this short a horizontal axis title is elided to nothing at
any window size - which is also why the resolution plot's vertical
"d (A)" was the only axis title that ever drew. The angle axis now
carries the degree sign on every tick instead of a title that cannot
render, and the lone "d (A)" goes: its labels each carry the unit
already, and no other plot titles its y axis.
"Spots + background" becomes two half-height plots stacked in the
same slot - the spot count above, the background below - each named by
a short bold label in its series' colour, its y axis reduced to the two
range ends, the lower plot carrying the x axis for both. Clicking
either jumps to the image, and Reset zoom resets both. This replaces
the twin-axis single chart, whose machinery (the secondary series and
its second y axis) is removed: two scales in one plot made the reader
match colours across the frame to know which curve reads on which axis.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015vRwzF8PLaaa2novAKYorq