LoadRunner result graph analysis provides three types of merge:
Overlay: overlaps the content of two graphs with one X axis. The Y axis on the left of the merged graph shows the value of the current graph. The Y axis on the right shows the value of the merged graph. There is no limit on the number of stacked graphs. When two graphs are superimposed, the Y axes of the two graphs are displayed on the right and left of the graphs respectively. When two or more charts are overwritten, analysis only displays one Y axis and scales different measurements accordingly.
Tile: view the content of two images with one x axis in the tile layout (one on the other.
Association: Draw the Y axes of two graphs, which correspond to each other. The Y axis of the activity chart changes to the X axis of the merged chart. The Y axis of the merged graph is used as the Y axis of the merged graph.