Showing celestial coordinate grids

GAIA can superimpose a celestial coordinate grid over the image.

1. Click on the Image-Analysis button in the menu-bar along the top of the main window and choose Overlay axes grid.... A window will appear with numerous options. You can change some of these if you wish, but there is no need to do so. Simply click on the Draw button and an axis grid is drawn in the current celestial coordinate system.

   The grid is removed when you click Close to close the window.

2. To show a grid in a different celestial coordinate system click on the Image-Analysis button in the menu-bar along the top of the main window and choose Change coordinates and then Celestial coordinates.... A window appears which allows you to specify the coordinate system. Choose the one required and then click the Accept button.

   Then repeat step 1, above, and a grid will be drawn in the new system.