The nRF Connect for VS Code extension uses the following sections of the VS Code interface: the Extension Views, the Editor, the Panel, and the Status Bar.
Most of the tools you will interact with are located in the nRF Connect Sidebar Views, within the Sidebar. You can access them by clicking the extension icon in the Activity Bar.
The following image shows the default placement of the UI elements (click to enlarge).
The extension follows the official VS Code User Interface terminology.