How to erase atoms, bonds and objects

Press E for the Erase tool and click what to remove; the part under the pointer lights up first. Or select it and press Delete. With a pen, scribble over it.

On a Mac, Ctrl is Cmd.

Steps

Press E for the Erase tool, or choose it at the right end of the toolbar.
Point at what you want to remove. The atom, bond or object under the pointer lights up, so you can see what the click will take.
Click to remove it.

Other ways

Delete a selection: select with V, then press Delete.
With a pen: scribble back and forth over a structure. See How to draw chemistry with a pen or stylus.

Removed too much? Ctrl+Z brings it back. See How to undo, redo and replay a drawing.

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Last updated Nov 12, 2026

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