Hi Rafael, there is no option for that in MoI version 1.0, but it has been added in for MoI 2.0 .

In MoI v2 it is available under Options > View > 3D view projection, there are options under that for either "Perspective" or "Parallel" :



MoI version 2.0 is currently in beta release and the beta is available from here for v1 owners to test: http://moi3d.com/beta.htm

Once the v2 final version is released, then there will also be a demo version available for it as well, that should not be too much longer.

- Michael