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<h1>Regular Expression Editor</h1><p>What you are currently looking at is an editor for <i>Regular Expressions</i>.</p><p>The upper part in the middle is the editing area, the lower part is a verification window where you can try your regular expressions right away. The row of buttons is the editing actions. This is actually very similar to common drawing programs. Select an editing tool to start editing your regular expression, and press the mouse button in the editing area where you want this item inserted.</p><p>For a more detailed description of this editor see the <a href="doc://">info pages</a></p><h2>What is a regular expression?</h2>If you do not know what a regular expression is, then it might be a good idea to read <a href="doc://whatIsARegExp">the introduction to regular expressions</a>.<p>