add in note in the graph box with right arrow pointing upwards

when you open the graph in a new tab , can you add a note that says  press ctrl +  to enlarge the image and ctrl - to reduce the image

<img width="370" height="306" alt="Image" src="https://github.com/user-attachments/assets/ea31bad8-d554-48a6-aa79-9bb089be65d7" />