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<title>Creating a Tangent to a Curve</title>
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<h1><a name="createTangent"></a>2.2.7.2 Creating a Tangent to a Curve</h1>
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Click the <strong>Modify</strong> button (<img src="png.d/bmodify.png">) to activate the <strong>Modify</strong> function.
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With the mouse pointer hovering over the endpoint of the object to be modified, <em>Left+Drag</em> (<a href="windowTerms.html#windowTerms">Section B.1</a>) to change the length of the track segment.
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If a <em>Left+Drag</em> is continued beyond the radius of a curved track (<a href="cmdCurve.html#cmdCurve">Section 2.1.2</a>) (not a Circle) a tangent to the curve will be created.
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Creation of the tangent begins when the distance from the curved track center to the cursor is greater than 110% of the radius. If the cursor is moved within the radius of the curve then the current command exits and the <em>Changing Track Length</em> (<a href="chgTrackLength.html#chgTrackLength">Section 2.2.7.1</a>) command is executed instead.
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If <strong>Easements</strong> (<a href="cmdEasement.html#cmdEasement">Section 2.10.4</a>) are enabled then an easement curve will be generated (if required) to connect the old and new tracks.
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For detail about;
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Changing track length refer to <a href="chgTrackLength.html#chgTrackLength">Section 2.2.7.1</a>.
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Changing track radius refer to <a href="chgTrackRadius.html#chgTrackRadius">Section 2.2.7.3</a>
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Extending track length refer to <a href="extendTrack.html#extendTrack">Section 2.2.7.4</a>
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