I want to know if I can import my graph than I create in an other .opj file, or import my .opj file in the file where there is my my graph (by using labtalk).
You cannot import graphs unless the graph has been saved as an OGG file (File : Save Window As...). You can append projects or add OGG-based graphs to an existing project with: document -append D:\Files\MyProject.OPJ; doc -a D:\Files\MyGraph.OGG;
Beginning with 9.1, we added the impOPJ X-Function which can import data from external OPJ or OGW files.
Speaking of "layout", 9.1 also added a Graph : Add Graphs to Layout option which acts like Merge Windows but creates a Layout window.