IDE Window

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The top of the window shows a title bar, menu bar and toolbar.
The contents of the file are displayed in a tabbed pane.
(Initially the file is empty so there is nothing to display.)

Hovering the mouse over a tool button displays its function.
The box at the top-right should display [Standard].

Click on the Run button to run the (non-existant) sketch.
Within a few seconds, a small window is displayed.
The canvas it contains is the default size of 100 x 100 pixels.
The sketch may be left running or stopped.