Using ORCA to edit MST files

(Taken from Wise newsgroups)

In order to edit the MST with ORCA, you need to load the MSI first, then the
MST. The ORCA display then shows the effect of the MST on the MSI. In this
scenario, the MSI is not changed. Any changes you make are only to the MST,
which you can save when you have finished.

EdT