Make the top bar hidden via a button or menu action, and add a button somewhere else on the window to restore the top bar.
This is for users who want to keep the graph screen real estate limited.
It may be a good idea to try to add an option to remove the line with the numbers on it as well, only preserving the graph.
This may be able to go a step further and have the bar automatically hide itself after a short period of the mouse not being on the graph, and have it automatically restore when a user mouses back over the window.
Make the top bar hidden via a button or menu action, and add a button somewhere else on the window to restore the top bar.
This is for users who want to keep the graph screen real estate limited.
It may be a good idea to try to add an option to remove the line with the numbers on it as well, only preserving the graph.
This may be able to go a step further and have the bar automatically hide itself after a short period of the mouse not being on the graph, and have it automatically restore when a user mouses back over the window.