Many users scratch their heads about the effect of layer pixel aligment, and resulting blurriness when looking at the rendering of images in Photo, or in exported (bitmap / raster) files.
In Photo, you can move layers to non-integer positions, using fractional digits - those digits after the decimal point (or comma for German locale). It is important to set-up Affinity accordingly to be able to inspect positions. First, use Preferences->User Interface Options and set Decimal Places for U