when I have several Projects (each in a Project File)
and want to have an overlook. It's not possible to
generate a chart with those projects included (maybe
also with an "update" button if one of the other files are
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You might be interested in alpha testing "Ganttproject
Integrator", this is a Windows only (maybe Mac OSX in future
if interest develops) utility that allows you to merge, clone
and manage a portfolio of Ganttproject files.
A time limited alpha is available here:
We are looking for feedback and feature requests...