Why can't I see files/folders on the desktop, Debian 9?

In the directory /home/user/Desktop has 3 files and 1 directory (although this is not crucial). But on the desktop they are not visible. What could be the problem?

KDE Development Platform: 4.14.26
KDE Frameworks: 5.28.0
plasmashell 5.8.6
March 23rd 20 at 18:58
1 answer
March 23rd 20 at 19:00
Solution
KDE users tightened.
In the properties for "desktop" select "Show folder contents" you can click the right mouse button on the desktop, you can through "Settings".
Thank you, how simple. Which begs the question:
The field is called "room Type", he has two options:
1 - folder View
2 - Desk by default

Why the need for "desktop by default"? - Freda.Brown3 commented on March 23rd 20 at 19:03
@Freda.Brown3, God knows, it's never been used :)
Probably just for looks. - Jared_Romague commented on March 23rd 20 at 19:06

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