Selecting and moving several items at once
How to select and move several items at once and what LOCK SELECT is for.
Select
Click on an empty spot of the stage and drag to draw a box: everything inside it is selected. To add or remove single items, hold Ctrl and click them.


Move
Once selected, drag any of the selected items and they all move together.
Keep the selection
Normally, clicking outside the selection clears it. Press LOCK SELECT and the selection stays until you press it again; you can still add or remove items with Ctrl + click or by dragging a new box.
