Diagrams rarely come together one shape at a time. Once a few elements are on the canvas you will want to move several at once, keep related pieces together, and make a row of shapes share the same look. livediagram gives you three tools for exactly that: selecting many elements, grouping them, and the format painter. None of them need a sign-in, so you can open a canvas and try them straight away.
Selecting more than one
The quickest way to grab several elements is the marquee: drag an empty patch of canvas and a selection rectangle sweeps up everything it touches. You can also build a selection click by click, adding and removing elements as you go. Either way, the selection becomes a single thing you can move, copy, or restyle in one go. See Marquee and multi-select for every way to gather a selection.
Keeping elements together
When a set of elements belongs together, turn the selection into a group. A group moves, copies, and selects as one unit, so a labelled box and its caption, or a cluster that makes up a single diagram component, never drift apart by accident. You can ungroup again whenever you need to fine-tune the pieces inside.
Copying a look
Once you have styled one element just right, the format painter copies that look onto others in a couple of clicks, so a whole diagram can share one consistent style without re-setting each colour and border by hand.
Marquee selection pairs well with the format painter: select a row of shapes, then paint a styled element's look across all of them at once.
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