Step 1: Lock
Once you have the basic elements of your design in place that you won’t want to move (such as the background), click on the object, head to the Arrange drop-down menu at the top of the interface and select Lock.
Step 2: Unlock
You won’t be able to edit or move the locked item, which is indicated by small crosses at the corners and central points. To unlock, repeat the previous step but select Unlock from the Arrange menu.
Step 3: Group
To group together a selection of items, click on one and then hold down the shift key while selecting the others. Head up to the Arrange menu and select Group.