How to display a sidebar item

Hello Everydoby !
I have a layout with a toolbar, a sidebar and a column to display the items in the sidebar.
I would like to click on a sidebar item, display a grid or a window in the next area (col2)
I only saw examples displaying a message that the item was selected …
Please, can anyone help me by indicating an example or a snippet?
Thank very much !

Hello!
Here is an example: https://webix.com/snippet/53972aa1

Thank you Nastja, it’s exactly what I needed !