I know, SE already can copy/paste file first panel to second panel. but doesn't have a "show same folder on other panel" function. if it has the function, panel will be more useful.

so please make the buttons, name is "show at second panel" button or menu , "copy to second panel" button or menu , "paste to second panel" button or menu

if i long-press the "test" folder at left panel and seclect "show at right panel" button, then open the "test" folder on right panel.

um... after select the files or folders at left panel, touching the "copy/past to second panel" button can copy and paste it, don't need to open the second panel.