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.
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Non-interlace Creates the file linearly from the top row of the image to the bottom row.
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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.
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None Uses no color reduction.
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Adaptive Creates a palette by sampling the colors from the spectrum appearing most commonly in the image.
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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.
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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.
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None Exports the shape or drawing without any rotation.
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Rotate left Rotates the shape or drawing 90 degrees counterclockwise.
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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.
