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2D Chamfer creates a process for putting a beveled edge on the part model.
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This part doesn't actually have a chamfer modeled on its edges,
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but sometimes a chamfer is used to remove the sharp edges of the part.
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We'll also be creating a new tool for our library.
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So under the 2D pull down,
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go to 2D Chamfer and select it.
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now we need to pick that chamfering tool.  So let's go to Select tools from library.
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If we scroll down, you might find a couple of chamfering tools at the bottom.
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We don't want those.  We want something a little smaller.
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We're going to create a new tool.
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to do that, first go to  Show library tree
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Expand the library tree
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Expand the documents and select the library for our current job.
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Which is   Intro to 2D Machining
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Now up on top we can say   New mill tool.
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the first page and the new tool dialogue contains cutter parameters.
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the cutter type should be set to Chamfer Mill.
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this tool will be of 5/16 outer diameter.
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A  5/16 Chamfer diameter.  A taper angle of 45°.
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and the bottom tip,
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will be 5/32.
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The flute length or the actual cutting edge of the part will be .078"
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The distance to the shoulder
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will be  .113"
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The full body length for the tool,
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we'll make that 1.7 inches
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The overall length will be the same.
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you can also put a description in for this tool.
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Now let's go to the Holder tab.
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A tool holder is not required, but it can be valuable for detecting collisions, when creating a tool path.
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Fusion contains a number of standard holders let's pick select holder.
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Scroll down until we find some CT40 holders. 
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Remember you can come up here into the description bar and drag that edge over.
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Then you can  see the full description of these tools.
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We're looking for a CT 40 .0250" by 1.38  End mill holder.
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Select that.
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You can also go to the speed and feed tab and set the default feeds and speeds for using this tool.
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Once we've completed all the settings
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we can say OK.
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and OK again to select that tool.
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On the Geometry tab we need to pick the areas that we're going to be machining.
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First I'm going to pick this open edge
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right here.
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the one on the other side
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and then along this outer contour
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this inner chain
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and the other pocket here
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when you're done you should have five chain's total.
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now lets go to our Heights tab
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and make sure that our bottom height is in reference from
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the selected contours,  with an offset value of zero.
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Take a look at our Passes so we can set our Chamfer for information
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for the Chamfer Width,
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set that  .012".   The Chamfer tip offset
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is how much it's going to cut passed the bottom edge.
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Chamfer clearance is a distance for the sidewall.
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Leave that set to  .031"
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we also want a set our compensation type to Wear 
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So that the operator can make adjustments to this tool path at the machine.
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Finally we'll go to our Linking tab
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and set some values for our lead in
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Set my horizontal Lead in to  .030"
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with  a 45 degree lead Sweep angle.
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.060" linear distance
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and  .080" vertical arc
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Turn off perpendicular motion.
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Now  OK
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and there's the chamfer on all the sharp edges.
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Another way of looking at this, is to select your Setup,
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right click,
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and take a look at this in Simulate
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you can turn on your raw stock.  You can turn your tool on or off.
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your tool path on or off
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and your stock  on or off and use your player controls down here
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to see the simulation.
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This is your speed control.
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In the center is no motion.
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To the left is backwards.  To the front is forwards.
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Hit play.
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That's what we have to this point
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for our machined part.
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if you haven't done so already I strongly encourage you to save your part.
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When you save your part Fusion will prompt you to enter a version description.
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You can enter some information about what you've done
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to this point
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in the process
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