A local image can be loaded in the image display. To load the image,click on the left button on top of the image display. A dialog boxwill be displayed to select the image to be loaded. Note that onlyimages in FITS format can be loaded in the image display. Also note,that the source coordinates in the form at the right are not changedwhen a local image is loaded. A dialog lets the user know if thecoordinates of the loaded image are inconsistent with the sourcecoordinates.
Loaded images can be saved locally using the Save button on topof the image display. Clicking on the Save button will display adialog box in which one can select the location and the name of thesaved image. Images will be saved in FITS format.
To specify and mark the location of the source coordinates, click onthe big cross in the tool bar of the image display. Next click in theimage display at the position that shall be the source center. A crosswill now mark the chosen position. Using the left mouse button youcan drag the cross, i.e. adjust the source coordinates to anotherlocation. The source coordinates are filled in the Source Coordinates field in the Source (Science Goal) or Field Source Editor (SB) panel at the right. The update also works in theopposite direction: editing the Source Coordinate field willmove the cross to the new position in the image display.
A coordinate grid in RA and Dec can be overlayed on the displayed image. To show the grid, just click the button with the tooltip Show/Hide Grid on top of the image display area when an image is displayed. This is a toggle button and the grid will be hidden by another click. The number of lines in the grid is automatically determined.
The zoom factor of the image can be set using the magnifying glassbutton below the image display. Note, that when the image is zoomed inthe main display, a yellow square marks the area of the image that isvisible in the upper smaller window. Using the left cursor button youcan position the yellow square and the area of the image that isdisplayed in the main window.