A.1.2 Menus

Most windows have a menu bar at the top containing one or more menus. These menus will usually provide the actions available from the toolbar (identifiable because they have the same icons), and may provide some other less-commonly-required actions too.

Here are some of the menus common to several windows:

File menu
Nearly all windows have this menu. At least the following options are available:
Close
Closes the window. This convenience button has the same effect as closing the window in whatever way your graphics platform normally allows. In most cases, closing the window does not lose state associated with it (such as fields filled in); if you recover the window later it will look the same as when you closed it.
Exit
Exits TOPCAT. You will be prompted to confirm this action if tables are loaded, since it might result in loss of data.
Help menu
Nearly all windows have this menu. The following options are available:
Help
Pops up the Help Window.
Help For Window
Pops up the Help Window; the window will display help information relevant to the window in which the menu appears.
About TOPCAT
Pops up a little window giving information on the version and authorship of the program. It also reports on availability of some optional components.
Display menu
This menu is available for most windows which display their data using a JTable component. If present, it contains a list of the columns in the JTable with tickboxes next to them - clicking on a column name in this menu toggles whether the column is visible in the window.