### 2.6. Navigation Dialog

Figure 15.15. Navigation Dialog

The Navigation dialog is designed to offer easy movement around the active image if the zoom is set higher than what the image window can display. If this is the case, there is a white colored rectangle that shows the location of the current view area in respect to the image. In this rectangle, the mouse pointer takes the form of a grabbing hand; outside this rectangle, it takes the form of a hand with pointing fore-finger.

To change the viewing region:

- Click outside the rectangular area with the pointing fore-finger on the wanted region.

- Click and drag the rectangular area.

- Use Shift and mouse-wheel to move horizontally, Alt and mouse-wheel to move vertically.

#### 2.6.1. Activating the Dialog

This dialog is a dockable dialog; see the section Section 2.3, “Dialogs and Docking” for help on manipulating it.

You can access it:

- from the main menu: Windows → Dockable Dialogs → Navigation;

- from the Tab menu in any dockable dialog by clicking the tab menu button and selecting Add Tab → Navigation,

- from the main menu: View → Navigation window.

- If you have scrollbars enabled, then you can access it more quickly (but without the zoom functions) by clicking on the icon at the right bottom corner of the image window where both scrollbars end.

#### 2.6.2. Using the Navigation Dialog

The slider

  It allows easy zoom level control, more precise than with the Zoom command. This slider can also be moved using the mouse wheel when the mouse pointer is on the slider, or Ctrl and mouse wheel.

Buttons
  Zoom Out, Zoom In, and Zoom 1:1

    These buttons are self explanatory.

  Adjust the zoom ratio so that the image becomes fully visible

    The zoom ratio is adjusted so that the whole image becomes visible in the window as it is.

  Adjust the zoom ratio so that the window is used optimally

    The image size and the zoom are adjusted so that the image is fully displayed with the lesser zoom.

  Reduce the image window to the size of the image display

    Restore the image window to the size which allows the image to be fully displayed with the zoom unchanged. This command is also as menu entry available. See Section 5.8, “Shrink Wrap” for the details.

2.5. Histogram Dialog |  | 2.7. Undo History Dialog

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