Yamaha DME64N Owner's Manual page 312

Chapter 5 Components
Changing the Window Size
In design mode, you can change the window size of the user control editor. If you align the mouse
pointer with a side or corner of the window, its shape will change into a double-headed arrow. When
the arrow is shaped like this, dragging it will change the size of the window.
Even if you change the width of the window, the library button will remain where it is, in the upper right
corner.
312 DME Designer Owner's Manual