PanGazer logo PanGazer – getting started


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Getting started

General settings


Compass points

Making panoramic images

Command line options

The gnomonic projection


Working with images

PanGazer should first start with a default panorama displayed; if not, select the Image → Open image menu item (or press the ‘p’ or Ctrl-O key). This will open a dialog which will allow you to choose a panorama or other image file.

To change the image viewpoint (positioning), you can:

  • left click on the image (the cursor will change to a ‘hand’) and drag the image (dragging also works if you have a touch screen)
  • use the keyboard arrow keys.

To change the zoom power (magnification) when viewing a image, you can:

  • move the cursor over the image and spin the mouse or touch pad scroll wheel forward (to zoom in) or back (to zoom out); this will keep the point under the cursor at the same position in the window
  • if you have a touch screen, the ‘pinch’ and ‘expand’ gestures should also zoom in or zoom out, centred on a point between your fingertips
  • use the ‘i’ or ‘o’ keys to zoom in or out while keeping the centre of the view fixed
  • use the Image → Zoom in or Image → Zoom out menu items, which have the same effects as the ‘i’ and ‘o’ keys
  • right-click on the image and choose Zoom in or Zoom out on the pop-up menu, which will keep the clicked-on point static while zooming.

To enhance the image (change brightness, contrast, etc.), select the Enhance view menu item from the Image or pop-up menus, or press the ‘e’ key; this will open the enhancements dialog. For more details, see the Enhancements page.

To view a different image, drag the new image from File Explorer to a PanGazer window (if you drag more than one, additional view windows will be opened). Alternatively, select the Image → Open new image menu item (or press the ‘p’ or Ctrl-O key); this will open a dialog which will allow you to choose a panorama or other image file.

PanGazer will automatically detect if an image is a 360 panorama or is (hemi)spherical and will display it appropriately; you can override these assumptions by unchecking the View image as 360 or View image spherically menu items from the Image menu or from the pop-up menu. In all cases the image will be centred and adjusted (and zoomed as necessary) to fill the window.

To save a view to disk, select the Save current view as... menu item from the Image menu or from the pop-up menu. This will display a save dialog which lets you select the folder and enter the name for the new image.

Saved images do not include overlaid status information or compass points, and are saved in either .jpg (JPEG, the default) or .png (Portable Network Graphics) format. After the image is saved it will be opened (using the current viewer for the image type selected) so you can check it, save it in a different format, print it, etc.

To add compass points to a view to give a sense of direction, you can Set North from the pop-up menu. See the Compass points page for details.

To centre the displayed image, select the Centre viewpoint menu item from the Image menu or from the pop-up menu, or use the ‘c’ key. This will position the centre of the image in the centre of the window at the default zoom power, if possible.

To make your own panorama image, see the Making panoramic images page for a couple of suggestions; there are also many other options.

Windows and window options

A image view is a window on the screen which displays an image. You can have more than one window open and each window can display an image with a different viewpoint and/or zoom.

To add a new view window, select the Window → New window (view) menu item, or press the ‘v’ key. This shows the same view initially; in the new window you can then change the viewpoint or image (as described above). You can add multiple windows and close (delete) them in any order; the application will keep running until you close all open windows.

If an image is not a 360 panorama, you can change the window shape to match that of the image by selecting the Window → Fit aspect ratio menu item; PanGazer will not move the window but will attempt to change its shape (keeping the same window area and staying within the bounds of the screen) to match the aspect ratio of the image. Fit aspect ratio is also available on the pop-up menu.

The window options (also under the Window menu item) let you change the appearance of the window. For example, to increase the amount of the window used for the image you can choose not to show the menu bar and/or title bar (the menu bar can be turned back on by right-clicking on the image to get a pop-up menu).

You can also maximize or minimize the window from the menu, or request that it be made full-screen. When full-screen, only the image is shown (to then restore it to a normal window press the Esc (Escape) key or right-click on the image for the pop-up menu and choose Restore). Similarly, you can choose Full Screen from that pop-up menu at other times, or just press the ‘Esc’ key (that is, the ‘Esc’ key toggles between full-screen and a window).

Settings, help, etc.

The Settings main menu lets you change settings that apply to all windows, including the status information to be displayed, coordinate formats, and the options for using a console window.  For details, please see the General settings page.

The Help main menu item lets you view these help pages locally or browse the PanGazer web pages (these are the same as the local pages).  In addition, the About PanGazer menu item confirms the version, origin, and .exe type of the application.

PanGazer may be started from the command line, or a script, with options to load a specified image file, etc.  It can also be started by clicking on a .jpg or .png file. For more details, please see the Command line help page.

PanGazer and these web pages were written by Mike Cowlishaw; Please send me any corrections, suggestions, etc.
All content © Mike Cowlishaw, 2014–2018, except where marked otherwise. All rights reserved. The pages here, and the PanGazer program, are for non-commercial use only.
Privacy policy: the Speleotrove website records no personal information and sets no ‘cookies’. However, statistics, etc. might be recorded by the web hosting service.

This page was last updated on 2018-09-23 by mfc.