# Magnetic Line of Force

Use Magnetic Field Lines to generate magnetic field lines used to align serial numbers.

Draw magnetic field lines manually through the annotation module's [magnetic field line] command, drawing in a similar way to drawing a sketch line. The difference is that only one section of line can be drawn, instead of continuously drawing multiple sections of broken lines.
Magnetic field lines with part serial numbers
- When you create or drag a magnetic force line, it automatically adsorbs the surrounding part serial number.
- Only part serial numbers belonging to the same view can be placed on each magnetic force line.
- Move the magnetic field line, and the part serial number adsorbed on the magnetic field line moves with it.
- Move the part serial number, the magnetic force line remains motionless, you can drag the part serial number from the magnetic force line out to cancel the adsorption effect.
Magnetic force line can be set parameters.
- Spacing: Set the arrangement rule of the serial number of the part on the magnetic field line, optional "free drag, equidistance".
  - Free drag: The serial number adsorbed on the magnetic field line can be dragged arbitrarily within the magnetic field line.
  - Equidistance: The serial numbers adsorbed on the magnetic field line maintain equal spacing, and the order can be adjusted, but the spacing between the serial numbers of the parts is always evenly distributed. Minimum spacing 0.5mm.
- Length: Set the magnetic field line length.
- Angle: Set the Angle of the magnetic field line to the horizontal direction of the drawing.
Magnetic field lines are hidden by default. When any magnetic field line or part serial number is selected, all magnetic field lines in the drawing are displayed, which is convenient to observe the existing magnetic field lines.