Crop image dialog box

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This dialog box controls is displayed when you are using the Crop command (New image menu).

Cropping tool
Selects the type of cropping area.

Rectangular cropping
A simple crop rectangle  You can control the edges and the angle of the crop.

Perspective cropping
A cropping region that converts from panoramic to conventional perspective.  Refer to “Perspective cropping” in in Chapter 4, “Using the Classic interface, step by step” for an example of perspective cropping.

Horizontally symmetric
Constrains the cropping region to be symmetric.  If you move the left or right edge of the region, the opposite edge moves to preserve the symmetry.

Vertically symmetric
Constrains the cropping region to be symmetric.  If you move the top or bottom edge of the region, the opposite edge moves to preserve the symmetry.

Fixed horizon line
Prevents you from editing the position or angle of the horizon line.  When cropping panoramic images, it’s usually important to keep the horizon line constant because it represents the zero tilt position for perspective cropping and for VR image export.  Moving the horizon line usually produces unexpected results.

            By default, this option is selected only for panoramic images.  You can temporarily override this option by holding the ALT key (Windows) or OPTION key (Mac) key when you move over the horizon line.

Fixed width
Prevents you from changing the width of the cropping rectangle.  When cropping a 360 degree stitched image it is usually important to keep the width constant if you’re planning to export to a VR viewer, otherwise the image will no longer be 360 degrees.  If you move one side of the crop rectangle when this option is not selected, the other side moves to preserve the width

            By default, this option is selected only for stitched images made with the 360 degree panorama option.  You can temporarily override this option by holding the ALT key (Windows) or OPTION key (Mac) key when you move over the sides of the cropping rectangle.

Cropped image size (pixels)
Shows the width and height of the cropped image in pixels.  These values update automatically as you adjust the cropping region with the mouse.  If you select Rectangular cropping you can also enter numbers into these text fields to control the size of the cropping region.

Horizontal field of view (degrees)
Shows the total field of view and the field of view to the left and right of the midline when Perspective cropping is selected.  These values update automatically as you adjust the cropping region with the mouse or you may enter values to control the size of the cropping region.

Vertical field of view (degrees)
Shows the total field of view and the field of view above and below the horizon when Perspective cropping is selected.  These values update automatically as you adjust the cropping region with the mouse or you may enter values to control the size of the cropping region.