Use this dialog box to set formatting, compression, transformation, and resolution options for a Microsoft Office Visio file that you want to export as a .gif file.

General

Data format

Specifies the data format of the image.

  • Non-interlace  Creates the file linearly from the top row of the image to the bottom row.

  • Interlace  Creates the file in a four-pass interlace pattern, which results in the image being displayed initially with poor resolution until the entire image loads.

Color reduction

Controls the color reduction process used for the exported file.

  • None  Uses no color reduction.

  • Adaptive  Creates a palette by sampling the colors from the spectrum appearing most commonly in the image.

  • Diffusion  Converts an image by using an error-diffusion process, starting at the pixel in the upper-left corner of the image. If the pixel's value is above middle gray (128), the pixel is changed to white—if below, to black. Because the original pixel is rarely pure white or pure black, error is inevitably introduced. This error is transferred to surrounding pixels and diffused throughout the image, resulting in a grainy, film-like texture. This option is useful for viewing images on a black-and-white screen.

  • Halftone  Uses evenly spaced dots of varying diameter to produce apparent shades of gray. The darker the shade at a particular point in the image, the larger the corresponding dot in the halftone. Varying the size and density of the dots creates the illusion of variations of gray or continuous color. For a process color image, four halftone screens are used: cyan, magenta, yellow, and black—one for each ink used in the printing process.

Background color

Sets the background color for the exported file. The default is white.

Transparency color

Sets the transparency color for the exported file. If the check box is selected, the default color is white.

Transformation

Rotation

Controls the rotation of the image in the exported file.

  • None  Exports the shape or drawing without any rotation.

  • Rotate left  Rotates the shape or drawing 90 degrees counterclockwise.

  • Rotate right  Rotates the shape or drawing 90 degrees clockwise.

Flip horizontal

Reverses the shape or drawing horizontally (around the y-axis) to produce a mirror image.

Flip vertical

Reverses the shape or drawing vertically (around the x-axis) to produce an upside-down image.

Resolution

Screen

Bases the exported file's resolution on the current screen resolution.

Printer

Bases the resolution on the current printer resolution and gives optimum printout results.

Source

Specifies that the source program determine the resolution.

Custom

Specifies a custom resolution. (Width x height dimensions should be between 32 and 400 pixels per inch.)

Size

Screen

Bases the exported file's size on the screen size and places the largest possible image within the dimensions of the screen while maintaining the aspect ratio of the original drawing or shape.

Printer

Bases the exported file's size on the currently selected printer paper size, and places the largest possible image within the dimensions of the paper size while maintaining the aspect ratio of the original drawing or shape.

Source

Bases the exported file's size on the size of the source file.

Custom

Bases the exported file's size on the custom size (width x height) you enter and places the largest possible image within the custom dimensions while maintaining the aspect ratio of the original drawing or shape.

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