Service menu to hide files adding a "." before their names. If used to hidden files it will show them removing the dot.
IMPORTANT: you have to download the "showhide" script too and place it i.e. in /usr/bin or other bin paths. Then you will be able to use the service menu and also use it by command line:
$ showhide file1
$ showhide .file1
If you don't want to move the script in /usr/bin, you can edit the .desktop file with: "Exec=/home/user/your/path/showhide %f" instead of "Exec=showhide %f".
Move the showhide.desktop in ~/.local/share/kservices5/ServiceMenus/