[for Affinity Designer 1.5.0.24]
1. Create a new document with a small pixel size (e.g., 48px width and 32px height).
2. Switch to pixel preview.
3. Draw an ellipse, beginning at the (more or less) exact left top of the document (this works
with 'magnets' switched to full pixels or not).
4. The pixelated circle probably will NOT start at the left top of the document, but somehow shifted.
5. Using the mouse wheel, zoom to different levels: Depending on the zoom level, the position
of the pixelated circle inside the document changes seemingly randomly by around two pixels.
Note that these are not screen pixels, but DOCUMENT pixels.
6. See the attached screenshots showing the SAME document containing an ellipse (with
left=0.5px, top=0.5px, width=32px, height=25px, linewidth=1px) on different zoom levels:
Left 460.6% (the circle shows up inside the document), right 398.7% (the circle seems to
start OUTSIDE the document).
7. The same effect is visible when switching on the grid: The origin of the grid shifts random-like
at +-1 document pixels depending on the current zoom level.
Andreas Weidner