With Prism 6 Windows, drawings (lines, arrows,..) can move when I open a file.

Problem. You make a graph, including lines, arrows, boxes, etc., and it looks fine. You save the file, then reopen, and some of the lines, arrows or boxes have moved.

Explanation: This problem can happen with Prism 6 Windows, when your graph with surrounding objects is very large and extends right to the edge of the page. 

Workaround: Make the graph a bit smaller, or move the objects away from the page edge. If nothing pushes right against the page edge, nothing will move when you save and then reopen the file. We'll fix this in a future release.