The scaling factors for the X, Y, and Z directions in Scale X, Scale Y, and Scale Z are separately given.

For the two-sphere example, the scaling factors of 3, 2, 1 for X, Y, and Z are given for the green ball with the domain origin, which is (0, 0, 0), as the scaling origin.

After scaling, not only the size of the object is changed, but also its center is shifted by the same factor (See the green particle before and after scaling for reference) when the domain origin instead of the center of the object is used.

If the mesh of the green particle is saved in ASCII format, it can be seen that the X, Y, and Z coordinates after scaling are 3, 2, and 1 times the original values, respectively.  

The screenshot below shows the coordinates of an example STL before scaling.

After scaling, the values of X-coordinate become 3 times of the original values, Y-coordinates become 2 times, and Z-coordinates keep the same as before.

Prior to GeoDict 2026, the scaling origin was always anchored to the domain origin (0, 0, 0). Starting with GeoDict 2026, however, users can now customize and choose the Origin of Scaling.

For the example used above, the domain size is 200 × 200 × 200 voxels with the voxel length 0.225 µm, which means the physical domain has the size of 45 µm × 45 µm × 45 µm. When clicking Set to Domain Center, Set to Domain Origin, and Set to Center of Mass, the X, Y, and Z position of the scale origin is automatically shown. For the center of mass, the density and volume of each material are considered.

The Scale Origin X, Scale Origin Y, and Scale Origin Z can be manually given, too. For this example, when the center of the green ball is chosen for the Origin of Scaling, which should be manually determined, the ball center does not move, but only the shape changes.