In this lesson, we'll talk about how to create or edit a milling setup. After completing this lesson you'll be able to modify the location of a coordinate system. Let's carry on with the file from our previous lesson and because we're continuing programming this file, we're assuming that somebody else started the program. It's a good idea for us to check the setup to ensure that we know where our stock is, where the coordinate system is, if we need to make any adjustments. So we're going to right-click on setup one and select edit. Notice the location of our coordinate system and if we rotate around to the saved home view, notice that this is in this upper left-hand corner. If we review the datums in the drawing this left side is A, the upper side along the x-axis is B, and the bottom is C. Now our drawing doesn't specifically call out critical dimensions in terms of a tolerance value, but this is the situation where we could technically change the XYZ coordinate to be a different location. For example, if we know the location of the bolt hole on the fixture played in this case, then we could use that as a reference for where to locate the rest of the features. This is all going to come into play if we have critical dimensions that we need to hold. In this case again, we don't really have those, but it's a good idea to be able to identify those and make adjustments if needed. What we could do, is we could position the location of our coordinate system, instead of by using a box point, we could use a selected point. We could rotate around and select the center of this specific bolt hole because we would know its location on our fixture. So this would give us an XYZ location based on the fixture plate and then it wouldn't necessarily relate to our Z coordinate movements all being negative when we're cutting the stock. But if we went all the way down to Z equals 0, we know that would be cutting into our fixture plate. So this is one potential way that we could come in and make adjustments to this program, to ensure that we're meeting some sort of tolerance or standard in terms of where we're referencing. Because if we go back to our box point in the upper left-hand corner and we use this as a reference, we're really looking at a stock that is oversize from our part, and if you're starting with this and you're machining everything from one side it's not a problem, but since we already have holes drilled and tapped on the bottom of this part, then it could potentially produce issues when we're trying to hold tight tolerances. In our case we're not really worried about that. So we're not worried too much in terms of the location of that XYZ, but we do want to make sure that it is in this case against the fixed jaw, and we understand where our datums are located A, B, and C and we keep in mind that tolerance values will potentially dictate where this coordinate system is going to be located. If we have any pre-cut features such as these holes, we want to make sure that we use them in reference so that we know all of our cut paths and our geometry is going to relate to that information. We don't have to make any adjustments to this file, so let's go ahead and save it if you have made any changes and then move on to the next step.