There's a "transform coords" button in the toolbar, to the right of the Toggle Priority Lines button.
If this is checked, then when you hover over the image, the "control points" of whatever drawing tool is selected (pen, line, fill) will light up and you can drag them.
That only works for individual points though.
To move groups of things, select the cmds in the cmd window on the left, then cut (ctrl-x) and paste back (ctrl-v). Then you should be able to drag them as a group in the image area (there are also hotkeys, on the numpad I think, to stretch/shrink them).