dialog used for that purposeProject Structure
To automatically complete a path
  1. Open the Select Path dialog by doing one of the following:
    • Click the Browse button browseButton.
    • Click New on the Project SDK page of the Project Structure dialog box.
  2. Make sure that the Path field is visible. If the field is hidden, click the Show path link.
  3. Start typing a path. IntelliJ IDEA suggests a drop-down list where you can quickly find the needed directory. As you type, the suggestion list shrinks to show the matching paths only. You can also press ⌃Space or ⌃Space⌃Space or ⌃Space⌃Space or ⌃Space^ Space, ⌃Space or ⌃Space⌥ Slash, ⌥/ or ⌥/ to show the suggestion list.
  4. Select completion from the list.

    completePath

See Also

Reference: