User could use Attach Legend to Plots button on legend mini toolbar button to put legend info. next to each plot.
E.g. in following image, user sets legend to represent mean value of each plot. Click the Attach Legend to Plots button, legend info. will be attached to end of each plot and they are linked.
If user then changes the legend to show other info., e.g. Comments info., the label after each plot will change as well.
In Origin 2023b, a system variable @ALP to control it. By default it’s 0 so label translation mode will be fixed so changing legend afterwards will not affect labels. Set @ALP=1 to roll back to old behavior.