How to hide files and folders
Find a file or directory you wish to hide with the file manager, and select it. Press F2 (or right-click and select “rename”). Next, place a . directly in front of the file name. Since most file managers hide hidden files by default, the renamed file or directory is now invisible. Do note that files placed in a hidden directory will also be hidden by default.
Asking another question:-1
Is screenshot above captured on Endless os.
Because it look flat.
But my PC is not
The screenshot is almost certainly captured on Endless OS. I think we are the only ones who use that font for the system.