Mouse Operations

• Click
  "Clicking on" an object means to move the cursor until it is on the object, and then depressing and releasing the mouse button. "Clicking in a window" means to move the cursor until the point of the cursor lies somewhere in the window, and then depressing and releasing the mouse button.
• Drag
  "Drag" usually means "hold the mouse button down and move the mouse.

Find the coordinates of a charge