To change the files permissions from Plesk control panel please follow the following steps:-
1) Login to Plesk control panel.

2) Click on "Domains" and then Click on "Control panel" in front of the domain whose files permession you want to change.


3) Click on "Websites and Domains".

4) Click on "File manager".

5) Check the check box in front of the file that you want to edit in the editor and then click on the editor button in the options under the "tool".

Note:-You can only edit .html and .htm files using this editor.
6) The files will be opened in the editor in the same window. You can make the changes in that file and click on "OK".
