What is the difference between opening and importing a reView (.spv) file?
If a reView file that contained the original SoftPlan file is opened, both the original drawing and the mark-ups
appear on the screen. If the same file were imported, only the mark-up items would appear. Open is likely used if
the original plan is unavailable or unchanged. Import is more likely to be used if work on the original drawing
continued after the reView file was created.