You can move your sketches by selecting them and using the arrows to reposition them.
Although you can select each line or arc of a sketch, you can do one of the following:
- Double-tap with your Apple Pencil or double-click with your mouse or trackpad a part of your sketch to select the entire complex sketch
- Long-tap with your Apple Pencil or long-click with your mouse or trackpad
Optionally, you can select from the Items manager.
Then, you can use the arrows to move the sketch anywhere on the grid. 
You can even copy and move the sketch.
