You can select multiple BPMN elements from the Flow Canvas and move them to another location in the Flow Canvas. Multiple BPMN elements can be selected with the combination of left mouse click and <CTRL> key or drawing selection rectangle on the activities.
A selection rectangle is a virtual rectangle drawn when you press right mouse button and drag over the activities. On release of mouse button, the rectangle becomes invisible and the activities inside drawn rectangle are selected. An example of multiple selections is displayed below.
Multiple activities can be deleted by selecting multiple activities on the canvas and selecting Delete from the right-click popup menu. Alternately, you can select the activities and press <Delete> key from the keyboard.