The new AlignmentViewer uses three spatial axes and one temporal axis. Any of the above variables can be mapped to any of the four axes using the dialog box in Figure 1 .
All variables appear on the right side of the box.
The four columns of radio buttons indicate which variables are mapped to the X, Y, Z, and time axis, respectively. Choosing the axis mapping When the position variable is mapped onto a spatial axis, an alignment appears as a comb-like glyph. The position of the comb in the 4D space is specified by the combination of the four mapped variables, with the comb extending along the position axis. We can imagine that the point opens up into a comb. An example is shown in Figure 2 .