Code Style. YAML
for Windows and Linux
for macOS
Ctrl+Alt+S 
Use this page to configure formatting options for YAML files. View the result in the Preview pane on the right.
Tabs and Indents
Indent | In this text box, specify the number of spaces (or tabs if the Use Tab Character checkbox is selected) to be inserted for each indent level. |
Keep indents on empty lines | If this checkbox is selected, CLion retains indents on empty lines as if they contained some code. If the checkbox is cleared, CLion deletes the tab characters and spaces on empty lines. |
Set from
Click this link and choose the language to be used as the base for the current language code style.
To return to the initial set of code style settings and discard the changes, click Reset.