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ENVI

Control Bar

Control Bar

The Control Bar has a number of different functions, described as follows:

Button

Description

Select button. When the Crosshairs or Z-profile button is enabled, click the Select button in the Viewing Area to update the crosshair position or the location the Z-profile is extracted from.

Pan button. Click and drag in the Viewing Area to adjust the image’s position.

Rotate button. Click and drag in the Viewing Area to rotate the image. The center point for rotation is always the center of the Viewing Area.

User Defined Zoom In Box button. Click and drag in the Viewing Area to define a box that the image will be zoomed into.

User Defined Zoom Out Box button. Click and drag in the Viewing Area to define a box that the image will be zoomed out of.

Crosshairs button. Click to toggle crosshairs on and off in the Viewing Area.

Z-profile button. Click to toggle the Z-profile window on and off. The Z-profile window behaves the same as ENVI’s Z-profile tool. Clicking the Z-profile button also turns on the crosshairs. The pixel currently under the crosshair is the one displayed in the Z-profile window. To change the pixel used for the Z-profile, click the Select button, then click on the desired location.

Zoom In button. Click to zoom in by small increments. You can also use the mouse scroll wheel to zoom in and out of the image.

Zoom Out button. Click to zoom out by small increments.

Global button. Click to use the global image statistics when performing image stretches.

Local button. Click to use image statistics from the image extent that is currently displayed in the Viewing Area, when performing image stretches.

Use the Stretch drop-down list to select a stretch type. The image statistics used for the stretch will be based on the last selection of either the Global or Local stretch options. If Local, the image extent at the time the Local button was pressed will determine the stretch statistics, regardless of the currently displayed image extent.

Use the Filter drop-down list to select a filter type for the displayed image.



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