Open the diagram for editing. For more information, see View, create, and edit a diagram in Visio Online.
Do the following:
Select a shape
Click a shape. The selected shape displays selection handles.
Select several shapes by dragging
Click on the page and drag the selection area to surround all the shapes by a temporary box with selection handles.
Select several shapes by clicking
Hold down the Ctrl key as you click each shape that you want to select.
Copy a shape by dragging
Press and hold the Ctrl key while you drag the shape that you want to duplicate, and then release the mouse button.
Move a shape by dragging
Click the shape, and then hold down the mouse button as you drag the shape to a new location.
Move a shape one pixel at a time
Hold down the Shift key, and then press an arrow key in the direction you want to move.