How to make a zoom

To make a zoom of a part of the mesh, set the ``zoom'' toggle on. A window appears (see figure 1.32).

Figure 1.32: Informations about the 3D zoom.

There are different ways of defining the dimension of the zoom area.
While manipulating the zoom, set the toggle ``skeleton'' or ``wire frame'' or ``solid'' on, depending on the number of nodes of your mesh. In most of cases the best solution is to visualize only the skeleton while the zoom is not well defined.

• The easiest way is to use the ``up, down, left, right'' arrows to move the mesh.

• Then use the ``-'' or ``+'' buttons to move forward or backward the mesh.

• You can also modify the $x$, $y$ or $z$ values definig the zoom bounding box in the zoom window. To set the new values you must push sequentially on the ``save'' and ``restore'' buttons.

• If you want to save the zoom definition, name the zoom file (the default name is ``vigie_3d.zoom'') and push the ``save'' button.

  Then ``restore'' allows to restore the dimension of the zoom area saved in the named file.

• To go back to the initial image, push the ``reset'' button.

• You can leave the zoom mode by setting the ``zoom'' toggle off in the working window or by pushing the ``quit'' button in the zoom window.

The next step is the positioning of a cut plane in the mesh.