The rulers
Unlike other editors, the Score Editor does not have a meter/time position-based ruler. Instead, its rulers are “graphical”, that is, they indicate the actual x-y position of objects (with “zero” at the upper left corner).
The current pointer position is indicated by thin lines in the rulers.
To hide the rulers, right-click on a ruler and select “Off”.
This pop-up menu can also be found above the scrollbar at the far right.
To display the ruler again, open the pop-up menu above the scrollbar at the far right and select one of the units (inches, centimeters, or points).
This setting also affects the units used in the Position Info window.