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Setting Display Preferences

Use Preferences to add virtual borders to an image, to edit the characteristics of the border, to change the size of the Image, Zoom, or Scroll windows, and to change the color of the Indicator Boxes in those windows. For a complete overview of ENVI Image display windows, see ENVI Image Windows.

Setting Virtual Border Characteristics

To append a virtual border to the Image window:

  1. From the Image window menu bar, select File  Preferences.

    2.  

  2. When the Display Parameters dialog appears, select from the following options:
    • To set the default so that each time an image is loaded a virtual border is used, enter the size of the border in pixels in the appropriately positioned text box.

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      The left box controls the left border, the right the right border, the top the top border, and the bottom the bottom border.

       

    • To change the default border color, select the desired color from the Border Color drop-down button.

     

  3. Click OK.

Turning Image Window Scroll Bars On/Off

Use the scroll bars in the border of the Image window to move around the image.

  1. Double-click the Zoom window crosshair box with the right mouse button or in the open display, select File  Preferences. The Display Parameters dialog appears.

    2.  

  2. Click the Scroll Bars arrow toggle button to select Yes or No.

    3.  

  3. Click OK.

Resizing Windows

  1. In the open Image window, select File  Preferences. The Display Parameters dialog appears.

    2.  

  2. Select from the following options:
    • To set the size of the Image, Scroll, and/or Zoom windows, enter the size (in pixels) in the corresponding text boxes.

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    • To enter a resize factor for the Scroll window, enter it into the Resize Factor text box.

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    • To set the zoom factor for the Zoom window, enter it into the Zoom Factor text box.

     

  3. Click OK.

For additional resizing techniques, see "Resizing the Image Window", "Resizing the Zoom Window", and Resizing the Scroll Window.

Changing Zoom Window Properties

To change the x or y size (in pixels) of the Zoom window, the zoom factor of the Zoom window, or the interpolation method used:

  1. In the open Image window, select File  Preferences. The Display Parameters dialog appears.

    2.  

  2. Select from the following options:
    • To change the size of the Zoom window, enter the corresponding x and y dimensions (in pixels) in the xsize and ysize text boxes.

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    • To change the zoom factor, use the arrow increment buttons.

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    • To change the interpolation method use the Zoom Interp drop-down button in the Zoom window to select from Nearest Neighbor, Bilinear, Bicubic, or Optimized Bicubic methods.

     

  3. Click OK.

Changing Indicator Box Colors

To change the displayed color of the Zoom box, the Image box, and the Zoom window crosshairs:

  1. From the Image window menu bar, select File  Preferences. The Display Parameters dialog appears.

    2.  

  2. In the Display Parameters dialog, select a color by using one of the following options:
    • Right-click on the Display Graphic Color colored box to choose from the color menus.

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    • Left-click on the Display Graphic Color colored box to cycle through the color choices.

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      Note
      To cycle backwards, click on the colored box with the middle mouse button.

     

  3. Click OK.

  ENVI Online Help (August 12, 2005)