Resizing a tree view/Child window

Help Studio
1

I’m automating a windows application, and as part of that process, I need to resize a child window. The window can be resized via splitter on the screen.

However, I can’t grab the splitter via the UiExplorer or within UiPath Studio. Any idea on how I can resize the child window?

2

Have you searched any keyboard shortcuts for that window? Maybe you can do it by sending hockey activity?