Adobe 65023809 Printing Guide - Page 84
Ensuring correct imaging of raster-based effects, Make with Warp, Make with Top Object
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Expanding Live Effects A live 3D object (left) is a simple cross section under the hood (center). While this allows you to edit the basic cross section shape (and thus the revolved object), you cannot select individual, shaded areas for editing, because they are not "real." To convert the live effects to editable vectors (right) expand the object (Object > Expand Appearance). Ensuring correct imaging of raster-based effects Illustrator CS4 offers stylized soft-edge effects such as Drop Shadow, Feather, and Inner Glow, which are rendered as pixels during output. While these effects are live and editable, their resolution during output is governed by the Document Raster Effects setting (Effects > Document Raster Effects Settings). By default, the Raster Effects setting in Illustrator CS4 is 300 ppi, which should be sufficient for most printing needs. However, files created in earlier versions of Illustrator may be set up with the previous default setting for Raster Effects of 72 ppi. The low resolution may not be obvious on screen, but it will be apparent in most output. Because these effects are live effects, rather than actual content, changing the Raster Effects resolution will correct the resolution of the effects. Bear in mind that, if the artwork will be scaled during placement in another application (for example, when placed into an InDesign layout), the final output size should be taken into consideration. An Illustrator file that will be scaled at 50% can have a Raster Effects setting of 150 ppi-scaling it at 50% will result in an effective resolution of 300 ppi, and so on. When most effects are applied to spot-color objects, the spot-color definition is retained; content is not converted to CMYK or RGB. However, the SVG effects (Effect > SVG Filters) do not support spot color. If SVG filters are used, affected spot-color objects become CMYK or RGB (based on the document color mode). If you need to modify effect-created shadows or glows in an Illustrator file supplied by a customer, open the Appearance panel (Window > Appearance), double-click the shadow entry in the panel and modify the settings as necessary. If you need to change a filter-created shadow or glow created in an earlier version of Illustrator, you must delete the existing content and create a replacement. It may be easier to accomplish this by displaying the file in Outline view (View > Outline). Use the Direct Selection tool ( ) to select the outline of the glow or shadow, and delete or move it as necessary. If your customer cannot provide the settings originally used to create the content, you will have to approximate the results. Consider replacing the filter-generated content with an effect-generated appearance instead, in the interest of future editability. Editing warps and envelope distortions Illustrator CS4 offers methods for distorting text and other objects, using a feature called Envelope Distort. Select an object or text with the Selection tool, choose Object > Envelope Distort, and select from the available options: • Make with Warp: Lets you choose from the 15 default Warp shapes, including Arc, Bulge, Flag, Fisheye, and others. Each Warp option offers controls over vertical and horizontal distortions. • Make with Mesh: Sets the number of rows and columns, and Illustrator creates an editable mesh. Select the anchors and control handles to manipulation the distortion manually. • Make with Top Object: Lets you create any shape with the geometric tools (ellipses, stars, and so on) or draw a shape (open or closed) with the Pen tool. Place the shape above the text or other object you wish to distort (higher in stacking order). Select the top object and the object you wish to distort, and Illustrator will distort the object using the top object as a guide. Effects and Spot Color The original spot-color shape (upper left) retains its spot-color definition when the Feather (upper right) and Extrude (lower left) effects are used. However, SVG effects such as the AI_BevelShadow effect (lower right) convert spot-color content to the color mode of the document. In this example, the bright Orange 021 of the beveled heart will print as CMYK, losing its vibrance. Adobe Creative Suite 4 Printing Guide 82
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