start rule: <select from navigator or grammar> in antlr plugin in IntelliJ : <p>I have created simple grammar file in IntelliJ but failing to see any effect of Antlr plugin. When I open file in ANTLR preview, it says </p>

<pre><code>start rule: &lt;select from navigator or grammar&gt;
</code></pre>

<p><a href="https://i.stack.imgur.com/3vMgl.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3vMgl.png" alt="enter image description here"></a></p>

<p>What is start rule? How to select it from navigator? How to select it from grammar?</p>
