Echogram navigation

You navigate around an echogram using a combination of scroll bars, mouse clicks, menu commands and keyboard shortcuts.

Note: The navigation methods described on this page do not apply to 3D windows, see 3D Navigation for more information.

Panning

On single beam echogram windows displaying scroll bars, you can pan in the following ways:

- OR -

- OR -

Scrolling

You pan through an echogram using:

Zooming

Zooming allows you to change the magnification level in the echogram window, e.g. to focus on specific part of an echogram. Zoom-in and zoom-out are limited for performance reasons.

Mouse wheel zoom

For single beam and multibeam echograms and cruise tracks, you can use the mouse wheel to zoom in and zoom out. To zoom out further than [1 ping:1 pixel] or [1 target: 1 pixel] use Ctrl + zoom out with the mouse wheel.

Zoom toolbar

A Zoom toolbar is available.

Zoom shortcuts

Keyboard zoom shortcuts include:

Option

Description

Zoom in

Zooms in on a selection or increases the magnification by a factor of two.

To zoom in:

  1. Optionally, make a selection around the area you want to zoom in on.
  2. Do one of the following:
  • Press S
  • On Shortcut (right-click) menu, click Zoom In
  • On the View menu, click Zoom In

Zoom out

Undoes the effect of the previous zoom in action: i.e. if you zoomed in on a selection, zoom out will return you to the level of magnification at which the selection was made; if you zoomed in without making a selection, zoom out will reduce the magnification level by a factor of two.

To zoom out do one of the following:

  • Press W
  • On the Shortcut (right-click) menu, click Zoom Out
  • On the View menu, click Zoom Out

Note: If you continue to select Zoom Out you will return to Echoview's least magnified view.

Unzoom

Zooms out to the lowest level of magnification.

To unzoom do one of the following:

  • Press U
  • On the Shortcut (right-click) menu, click Unzoom
  • On the View menu, click Unzoom

Synchronizing echograms

When more than one echogram window, or other supported windows are open in an EV file, then all windows can be synchronized to show the same area of data. Synchronization relies on matched transducer geometry between the focused and secondary windows.

Note: Multibeam echogram synchronization does not handle depth to range calculations.

Auto-synchronization

An echogram, cruise track, 4D window, Media window or supported graph can be added to the auto-synchronized group using the shortcut key (Shift+A) or the toolbar button, auto synchronization tool. You can see if a window is in the auto-synchronized group by the status of this toolbar button when the window is active. The button appears depressed if it is and raised if not.

When a window is added to the auto-synchronized group, it is immediately synchronized to the windows already in the group, if there are any.

For this purpose, each window has a time determined as follows:

single beam echogram:

the time of the ping nearest the center of the echogram window.

multibeam echogram:

the time of the ping currently visible (seen in the status bar).

cruise track:

the time is marked with a crosshair (cruise tracks are slaves in the auto-synchronized group, the crosshairs move in response to echogram navigation).

Media window:

the time of the frame associated with the Media slider position. The Playback time is displayed to the side of the slider control.

the time of the image associated with the Media slider position. The Playback time is displayed to the side of the slider control. See also image Media Display Properties.

Echoview also supports the synchronization of towed body image and video media through Media Position Properties. See also Synchronizing towed body media with echograms.

heading graph, length graph,

line graph, ping graph,

pitch graph, roll graph:



the time of the ping locator on a single beam echogram.

On single beam echograms a ping indicator that can be dragged by the mouse pointer, identifies the current ping. On multibeam echograms the time slider is dragged to display ping. Any echogram in the auto-synchronized group can be used to control the:

Notes:

Mouse pointer duplication

Open echograms, cruise tracks, alongtrack displays, line-referenced echograms and supported graphs display an indicator that duplicates the moving mouse pointer position on an active echogram, cruise track, alongtrack display or graph.

Duplicate mouse pointer indicators include the:

To toggle mouse pointer duplication:

Notes:

See also

Navigating Echoview
Graph navigation
Echogram tools toolbar
About keyboard shortcuts
Using image data
Using video data