1. Choose to zoom in the axial direction, X, Y, Z of three axis can be freely switched；
2. Lock ratio is zoom of overall situation (default), users click to open by axial uniaxial zoom;
3. Enter the number that you want to scale in the numeric input area.
4. Click on the common numerical values to move directly, and the system provides six values of 0.5, 0.8, 1.2, 1.5, 2, 10.