There are a few methods by which you can move graphics around on your canvas.
Copy, Cut, Paste
Use the copy, cut and paste tools on your toolbar, or use your keyboard shortcuts to do so.
Simply click to select the graphic element you would like to move and drag it into position.
Use arrow keys
Move graphic elements on your canvas using the arrow keys on your keyboard. Click to select the graphic, and then move it up, down, left or right.
You can undo all actions by using the Undo/Redo buttons at the menu toolbar on top, or you can use keyboard shortcuts CTRL-Z to undo and CTRL-Y to redo.