User manual

The delete tool is highly dependant on the context. Depending on the element(s)
selected with the mouse, it will delete one of the following:
 The graphical addition(s);
 The view(s);
 The plane(s).
Furthermore, by pressing simultaneously the "SHIFT" key, all the data loaded in Aladin
will be deleted. Use with care, there is no “undo” function in Aladin!
The other tools accessible via the tool bar are detailed in the other sections of the
document.
5.1.4 The zoom panel
The “zoom panel” is located on the bottom right of the main window. It displays an
illustration of the total image on which is superimposed a translucent blue rectangle.
This rectangle traces the part of the image that is shown in the
view with respect to the global image. It enables the user to find
his way around the global image.
The rectangle can be moved around with the mouse. The view
changes automatically to show the corresponding image
portion. If the visible region is completely out of the image, a
The overlaid information gives the angular size of the global image.
The current zoom factor can be modified easily by scrolling the mouse. In order to centre
the view at the maximum size, one can click the zoom panel while keeping the Ctrl key
pressed.
5.1.5 Location band
On top of the main window, below the menu, two fields display the current location and
the pixel value corresponding to the mouse pointer in the view. Each of these
informations can be displayed in a specific reference system given in the folding menu
located on the right of each of these fields.
Location
The location can be given in celestial coordinates or in abscissa/ordinate in the image.
The celestial referentials available are ICRS, J2000, B1950, Ecliptic, Galactic,
Supergalactic. The display may be either sexagesimal or decimal. The accuracy of the
location depends on the current zoom factor.
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