Hi Robinho,
I understand that you are looking to know more about the control slider in the animation while using “drawnow” or “addpoints” function.
The slider you are referring to is called a "data cursor" in MATLAB. By default, it appears when you create a plot with a line object, and you hover over the line with your mouse cursor. However, it may not always appear when using “addpoints” to animate a plot.
To ensure that the data cursor appears, you can use the “datacursormode” function in MATLAB. This function allows you to enable or disable the data cursor mode for a specific plot or all plots in a figure.
You can also customize the appearance and behaviour of the data cursor using various options available in the “datacursormode” function.
To learn more about the "datacursormode" function, you can refer to the following link: https://www.mathworks.com/help/matlab/ref/matlab.graphics.shape.internal.datacursormanager.html
Hope it helps!
