Set the initial size and from there make the selection so that it won't move. Compared to other function types, one characteristic of this function is the light processing load on the CPU.
| Constant | Fix the size to keep it the same |
| Newton Dynamics | Set the size based on values speed and acceleration |
| Curve Value | Set the fixed size for keyframes in Timeline |
| Curve Speed | Set the scale speed for keyframes in Timeline |
| Value | Specify the initial sizes of particles. The random value is initial scale with a random range. The random range is between -(specified value) and +(specified value). |
| Speed | Specify the scale speeds for particles. The random value is speed with a random range. The random range is between -(specified value) and +(specified value). |
| Acceleration | Specify the scale accelerations for particles. The random value is acceleration with a random range. The random range is between -(specified value) and +(specified value). |
