Fronts and Fireworks Positioning
Fronts are lines that help you align your fireworks.
They exist only for convenience. You can place fireworks anywhere, not just on fronts!
Creating FrontsSelect the "Fronts" tab in the sidebar: Click the buttons in the sidebar to add or remove fronts. Move the fronts by dragging the circles in the 3D view.
If you move a firework near a front, it automatically snaps to it. The front becomes blue if the firework is snapped to it.
To disable snapping, hold the CTRL key.
If a firework is snapped to a front, and you move the front, the firework moves too.
The start and end points of steppers can be on different fronts: