Viewer Parameter > viewer > viewer.allowmultiframe

viewer.allowmultiframe

Sets whether or not to allow multiple OZ Viewer windows from a single web browser.

Values

true	Allow multiple OZ Viewer
false	Allow single OZ Viewer(The default value)

Reference

Applies only if the "viewer.isframe" parameter value is "true" or "inprocess" and the "viewer.closeframe" parameter value is "false".