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Find out how to create compelling architectural designs using the modeling tools in Autodesk Revit software. In this course, author Paul F. Aubin demonstrates the entire building information modeling (BIM) workflow, from creating the design model to publishing a completed project. The course also covers navigating the Revit interface; modeling basic building features such as walls, doors, and windows; working with sketch-based components such as roofs and stairs; annotating designs with dimensions and callouts; and plotting and exporting your drawings.
So far in this chapter we have seen global object-style settings and view-specific overrides at both the category and the object level. Sometimes none of these methods is sufficient to get just the right graphical treatment for a drawing. In such situations, we have the Linework tool, our last line of defense if you will. With this tool, we can actually modify the individual edges that make up an element, and vary them as required. For example, we could make one side of a wall bolder or we could change a roof overhang to a dashed line in certain areas of the plan. The Linework tool can be just what you need to add the finishing touch to your work, but again, please remember to use it sparingly.
So I'm in a file here called Linework, and I'm going to zoom in on the double volume space over here where we have our lobby down below. This is the second floor plan, the Level 2 Floor Plan. Right here I have a floor object that provides a balcony, and then there's a railing right here. And it would be pretty common to want to see some indication that we have this balcony in the floor plan down below, but if I go to the Level 1 floor plan, you can see that there's really no such indication. So there are a few different ways you could approach this. I mean we could just draw some drafting lines and simulate that there was an item overhead by putting some dash line work, but we want to do something that's a little bit more tied to the model.
If you do drafting lines, they are not linked anything and if the shape of that overhang changes, then you're not really going to have any indication that that change has taken place. So instead what we're going do is leverage the objects that are already here--the floor slab up above--and we'll just simply change the way it displays with respect to the first floor plan view. So to get started, I want to come over here to the Floor Plan properties, so make sure nothing is selected here in drawing and that this says floor plan right here. I'm going to scroll down, and I'm going to locate the Underlay feature. And you could see it currently says None.
Now the Underlay emulates the traditional underlay going back to the days of hand drafting, where you would take one sheet and you would slip it underneath the other sheet and then you'd be able to see through and trace over and use the sheet underneath for reference. So the Underlay is sort of a digital equivalent of that same idea, and what I'm going to actually do is underlay Level 2 here on Level 1. Now when I apply that, you're going see it's going to underlay the floor plan representation. And I'm seeing the railing and the edge and so forth, and that might be fine, but we actually have two choices for Underlay orientation: Plan and Reflected Ceiling Plan.
So I'm going to choose Reflected and click Apply and see if that gives me a cleaner view. And in fact it does. So when I go to that Reflected, I just get the single edge, and that might be a little easier to work with. So now that I have the underlay, if you move your mouse over here, what you see is that's actually the real object. If I click on that, it selects as a floor object. That is the actual floor right here. So you want to be careful here, because if you make a modification, you're actually modifying that floor up above. So this isn't just some little graphical trick. Now this is only temporarily visible as long as I have the Underlay feature turned on.
Eventually, I'm going to want to turn that Underlay off, because you can see there's a lot of other busyness going on here in the file. But if I use the Linework tool, I can reach in here and override just individual parts of this underlay, and then when I turn the Underlay off, those overrides will remain. So let's take a look at that. I'm going to go to that Modify tab and here on the View panel we'll find the Linework tool. LW is the shortcut. That reveals a single panel here on the Modify tab, the Line Style panel, and it's got a dropdown.
And we see all of our standard Line Style dropdowns. And I'm going to choose this Overhead lines option right here. That's a dashed line that will be used for overhead items. And I'm going to click right on this line edge right there and right here. Now what you'll see is when the line is selected, it's actually got these little grips on there. So if I zoom in over here, if I'm not satisfied with the extent--it looks like it did a pretty good job, but let's just say I wasn't-- I can actually drag the extent of that.
I'm going to go ahead and drag it back over here. No need to change it, but that will actually display as a dash line. That dash line will remain displayed when I turn off the Underlay. Now if you wanted to, you could keep going here, and I could actually use the same feature to select these lines of the roof up above and get the eave of the roof to display here in the floor plan as well. That's up to you. I'm going to go ahead and click the Modify tool, go back to my floor plan Properties, scroll down, take the Underlay feature, set it back to None.
That turns it off, but notice that this Linework override remains. So now I can tell that I have a balcony up above, and I can tell that I have a roof overhang around the plan. So the Line Weight feature can be a great way for you to go into your drawing and make little cleanups that you need to make to very specific edges and parts and pieces of the individual geometry. It's a view-specific change and not only is it view-specific, it's edge-by-edge-specific, so it's a very isolated, very surgical approach. You want to use it sparingly.
You don't want to get carried away with this and start overriding all the linework using the Linework tool. If you find yourself using this a lot, then maybe you want to think about, is there a way to do it with Visibility Graphics or is there a way to do with Objects Styles so that it's a little more global and little less labor intensive. But it can be a great way to do those quick little last-minute cleanups to give your drawings just that read that they need.
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