HSpot uses several icons as shorthand for commonly used functions that are also available under the menus. They are shown in Figure 7.1, “ Shortcut icons used on the main screen of HSpot”. The first three icons are associated with handling AORs. From left to right the icons are: read in AORs/targets from a file; save AORs/targets to a file; undo last action. A button is displayed in colour if active and grey when inactive (e.g. you cannot save AORs unless you have defined some AORs to save).

Figure 7.1.  Shortcut icons used on the main screen of HSpot

The next three AOR icons become active once you have defined AORs.

The four bulls-eye icons are for manipulating targets.

The image manipulation icons will appear on the left-hand side of the HSpot window zooms in the current image, and this one whenever you display images (Figure 7.2, “Zoom and centring icons”). The magnifying glass icons are all for zooming your images in or out. There is a stack of twelve image control icons. The top two zoom in, either for just the current image or for all images (if you have only one image displayed the “all” icon will not be active). The next two zoom out, again either the current image or all images. The crosshair icon is used to centre the image on the current target if the image is larger than the size of the window. The next icon identifies the current target on the image. The section of geodesic globe plots a grid on the image. The graph icon plots a graph of the flux between two points. The capital Sigma (Σ) gives area statistics. The interlocked squares icon crops the current image. The "X=" icon opens the distance tool to compute the distance between two points. The final two icons plot marks on the image at a point determined by the user overlay another image, respectively.

Figure 7.2.  These image manipulation icons will appear on the left of the HSpot window whenever images are displayed.