Project Interpreters

File | Settings | Project Interpreter - cogwheel button - More for Windows and Linux
PyCharm | Preferences | Project Interpreter - cogwheel button - More for macOS
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Project interpreters

This dialog box shows up on choosing More...:

Use this dialog to configure the list of available Python interpreters.

Item	Tooltip and shortcut	Description
	Add Alt+Insert	Click this button to select a Python interpreter type (local, remote, or virtual environment) from the pop-up list. Refer to the section Configuring Available Python Interpreters for details.
	Remove Alt+Delete	Click this button to delete the selected Python interpreter from the list of available interpreters.
	Edit Enter	Click this button to change name and location of the selected Python interpreter. Refer to the section Changing Name of a Python Interpreter or Virtual Environment.
	Show virtual environments associated with other projects	If this button is pressed, the virtual environments, already associated with the other projects, are shown in the list of available interpreters. Otherwise, the list only includes the virtual environments not used in the other projects. This behavior is stipulated by the check box Associate this virtual environment with the current project, (refer to the section Creating Virtual Environment for details).
	Show paths for selected interpreter	Click this button to show the list of interpreter paths.

Interpreter paths

This dialog box shows up on clicking in the Project Interpreters dialog box. It shows the paths where the external libraries reside. If a library has been added, it is recommended to click the Reload button to rescan the Python installation.

Item	Tooltip and shortcut	Description
	Add Alt+Insert	Click these buttons to add external libraries for the selected Python interpreter.
	Remove Alt+Delete	Click these buttons to remove external libraries for the selected Python interpreter.
	Reload List of Paths	Click this button to rescan libraries for the selected Python installation. For example, clicking this button helps update external libraries, if some packages have been upgraded.