Ajuda do LibreOffice 7.3
Centra horizontalmente os objetos selecionados. Se for selecionado apenas um objeto no Draw ou no Impress, o centro do objeto é alinhado ao centro horizontal da página.
The vertical position of the selected objects is not affected by this command.
To align the individual objects in a group, choose
to enter the group, select the objects, right-click, and then choose an alignment option.To align the individual objects in a group, double-click to enter the group, select the objects, right-click, and then choose an alignment option.