to insert interface use shortcut ctrl+alt+i (command+alt+i for Mac), or press F1 and then select/type Insert interface
to replace selection by interface use shortcut ctrl+alt+o (command+alt+o for Mac), or press F1 and then select/type Replace by interface
to export interface to a file use shortcut ctrl+alt+u (command+alt+u for Mac), or press F1 and then select/type Export interface
Configuration
interface-builder.defaultInterfaceName: Install default interface name. Used when insert and replace and when exporting with blank interface name. Follow the TS syntax rules.
interface-builder.postfix: Used for exporting file name. Example: user.type.ts