3.2.2  Background menu

By the menu Background, you can set System parameters. Its availability is described in the section <background>:

3.2.2.1  System...

By the menu item System..., you can change the System (with Groups and Bodies), by the dialog window Create new system/System properties.

3.2.2.2  Go Center

By the menu item Go Center, you can set the origin of the coordinates in the screen center.

See further the section Change view.

3.2.2.3  View...

This is the menu item to switch on/off the View state.

See further the section Change view.

3.2.2.4  Zoom...

This is the menu item to switch on/off the Zoom state.

3.2.2.5  Select/Group/<group list>

By this menu item, the members of a group can be made selected.

See further the section Selection.

3.2.2.6  Select/Select All

By this menu item, all the bodies can be made selected.

See further the section Selection.

3.2.2.7  Select/Deselect All

By this menu item, you can make each body unselected.

See further the section Selection.

3.2.2.8  Select/Invert All

By this menu item, you can invert body selection. The one selected becomes unselected and vice versa.

See further the section Selection.

3.2.2.9  Repaint

The command Repaint will delete and redraw the screen. The short key of this command is F5.

See further the section Refresh.

3.2.2.10  Refresh

The command Refresh will redraw the screen. The short key of this command is Shift+F5

See further the section Refresh.

3.2.2.11  Add bodies...

By the menu item Add bodies..., you can create new bodies by using the mouse.

See further the section Create new body by using the mouse.