Selecting

Shift-click

Add or remove a bubble. Drag any selected bubble to move them all.

⌘/Ctrl A

Select all bubbles on this floor

⌘/Ctrl C, V

Copy and paste, even onto another floor. Real-world size is kept.

Esc

Clear the selection

Bubbles

Corner dot

Drag to resize. Neighbours push out of the way.

Floors and view

Floor tab

Double-click to rename. Drag to reorder.

Pan and zoom

Click the hand, then drag. Type an exact zoom %.