File | Settings | Editor | General | Breadcrumbs for Windows and Linux
PyCharm | Preferences | Editor | General | Breadcrumbs for macOS
Ctrl+Alt+S
Use this page to configure editor breadcrumbs for the supported languages.
Show breadcrumbs
When this checkbox is selected, the path from the root element in the current document to the code element where your caret is will be shown in the editor:
Placement
Choose whether you want to have breadcrumbs at the top or at the bottom of the editor. The default option is Bottom.
Languages
Select the checkboxes next to the language contexts where you want to have breadcrumbs.
Manage colors
Click this link to open Color Scheme page and configure colors for breadcrumbs.