Drag to resize Panels

Hi. I’m new to Axure…and struggling every step of the way. Fortunately, the community is very helpful. I want to replicate the panel resize mechanisms of left, center and right hand content areas. The axure application itself demonstrates exactly what I want to do. Axure’s left hand panel, contains Pages, Outline | Libraries Masters , Center panel is the ‘canvas’, right hand panel is properties. The boarder, between the panels shows a draggable arrow on mouse enter / hover. Dragging the arrow reduces/increases the panel size and the remaining content expands or shrinks as needed. I’ve read a ton of threads and watched videos that show how to resize an object or even two, but nothing that really shows (and easy way?? to do what I see in the axure app and many modern apps. Thanks for your help