To toggle between upper case and lower case
Select text fragment, or just place the caret at the line you want to change case in.
Press Ctrl+Shift+U or choosein the main menu.
CamelCase names are converted to the lower case.
Lowercase names are converted to the uppercase format.
Uppercase names are converted to the lower case.
To toggle between CamelCase and snake_case
Select text fragment you want to change case in.
On the main menu, choose, or press Shift+Alt+U.