Hi,
You cannot create a text label and directly attached to a data point in Origin. But you can move the text label to the coordinate position of the data point, each text label is a graphic object and it shares members of graphic object.
For instance,
label -n Text1 Test; // Create a text label named Text1 with display text as Test
Text1.color = color(blue); // Color Text1 as blue
Text1.x = %([Book1]Sheet1!Col(1)[1]$); // Move x to position
Text1.y = %([Book1]Sheet1!Col(2)[1]$); // Move y to position
You can only add a label to a particular data point through GUI, by clicking that data point once and click again and right click to select "Edit". Then you can add a label for it through Plot Details: Plot Properties dialog.
Regards!
Sean
OriginLab Tech. Service