Vector Graphics and Bitmaps

Posted On 5:51 AM by Komputer Grafis | 2 comments

The two main types of computer graphics are vector graphics and bitmaps. Vector graphics are made of lines and curves, and they are generated from mathematical descriptions that determine the position, length, and direction in which lines are drawn. Bitmaps, also known as raster images, are composed of tiny squares called pixels; each pixel is mapped to a location in an image and has numerical color values.

Vector graphics are ideal for logos and illustrations because they are resolution-independent and can be scaled to any size, or printed and displayed at any resolution, without losing detail and quality. In addition, you can produce sharp and crisp outlines with vector graphics.

Vector Graphics and Bitmaps

Bitmaps are excellent for photographs and digital paintings because they reproduce color gradations well. Bitmaps are resolution-dependent — that is, they represent a fixed number of pixels. While they look good at their actual size, they can appear jagged or lose image quality when scaled, or when displayed or printed at a resolution higher than their original resolution.

You can create vector graphics in CorelDRAW. You can also import bitmaps (such as JPEG and TIFF files) in CorelDRAW and integrate them into your drawings.

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Previewing a Drawing

Posted On 5:47 AM by Komputer Grafis | 0 comments

You can preview a drawing to see how it will look when you print and export. When you preview a drawing, only the objects on the drawing page and in the immediate area of the drawing window are displayed, and you can see all layers that are set to print in the Object manager docker. If you want a closer look at specific objects in a drawing, you can select and preview them. When you preview selected objects, the rest of the drawing is hidden.

Before you preview a drawing, you can specify the preview mode. The preview mode affects the speed with which your preview appears as well as the amount of detail displayed in the drawing window.

By default, the borders of a page are displayed in the drawing window, but you can hide them at any time. If a drawing is intended for print, you can display the area that will actually print as well as the bleed, the part of the drawing that extends beyond the page border. Bleeds are useful when a drawing contains a color page background or objects positioned on the page border. Bleeds ensure that no white space appears between the edges of a drawing and the edge of the paper after the printer cuts, binds, and trims the document.

To preview a drawing :

• Click View Full screen preview.

Click anywhere on the screen, or press any key, to return to the application window.

• You can press Page up and Page down to preview pages in a multiple-page drawing.

To preview selected objects :

1. Select the objects.
2. Click View Preview selected only.

Click anywhere on the screen, or press any key, to return to the application window.

• If Preview selected only mode is enabled and no objects are selected, Full screen preview displays a blank screen.

To specify the full screen preview mode :

1. Click Tools Options.
2. In the Workspace list of categories, click Display.
3. Enable one of the following options:

• Use draft view — displays the drawing without PostScript fills or high-resolution bitmaps without using anti-aliasing
• Use enhanced view — displays the drawing with or without PostScript fills with anti-aliasing to display a sharper version of your drawing
• You can display PostScript fills when you preview in Enhanced mode by enabling the Show PostScript fills in enhanced view check box.

To set page display options :

1. Click Tools Options.
2. In the Document list of categories, click Page.
3. Enable one of the following options:

• Show page border — displays page borders
• Show printable area — usually displays two dotted lines inside or around the page, depending on the current printer settings. One outline indicates the area that can be printed on the current printer; the other outline indicates the paper size your printer is set to use.
• Show bleed area — displays the area of the drawing extending beyond the page border. To change the bleed area, click Size in the list of categories and type a value in the Bleed box.

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