1) In Page Designer, open to the page you wish to group elements on.
2) Select all of the elements you wish to group. Either click and drag the mouse over them or shift-click multiple elements.
3) Once selected right click and choose 'Group' to group the elements. Or use the 'Group' and 'Ungroup' options in the upper right.
4) To make edits to the group such as rotate, flip, increase size, or increase width. Use the Transform and Arrange menus in the upper right.