Hi @Dennisbur ,
One way to do this is to add the limits as meta data to the column. If you right click the column, then select Column Info, under Column properties, you can add Spec Limits and/or Control Limits.
![SDF1_0-1672930516928.png SDF1_0-1672930516928.png](https://community.jmp.com/t5/image/serverpage/image-id/48825i1BD6CA8DFF8F1532/image-size/medium?v=v2&px=400)
Then, you can enter the upper and lower limits, and if you check the Show as Graph Reference Lines, they will show up in all graphs as thin blue lines.
![SDF1_1-1672930634627.png SDF1_1-1672930634627.png](https://community.jmp.com/t5/image/serverpage/image-id/48826iC9DDB1F43057186A/image-size/medium?v=v2&px=400)
One other way is how you're doing it by adding the lines to the specific graph you are working with. You would have to add each low/high limit line manually.
Hope this helps!,
DS