Atom Selection

ACoord provides atom selection tools for analysis and editing.

Selection Methods

Single Selection

• Click on an atom to select it
• Selected atom highlights with glow effect
• Info appears in Properties panel

Multi-Selection

• Hold Ctrl/Cmd + click to add/remove atoms from selection
• All selected atoms highlight
• Panel shows combined info

Box Selection

1. Ensure Select tool is active (press V or click Select button in left toolbar)
2. Click and drag in empty space (not on an atom)
3. A selection box appears
4. Release to select all atoms inside
5. Hold Ctrl/Cmd while releasing to add to selection
6. Hold Alt while releasing to subtract from selection

Deselect

• Click in empty space
• Or press Esc

Selection Info

The Properties panel displays:

• Element — Atom type
• Position — Cartesian coordinates (x, y, z)
• Distance — Between 2 selected atoms
• Angle — Between 3 selected atoms

Selection Actions

Once atoms are selected, you can:

• Delete — Press Delete key
• Move — Drag to new position
• Copy — Ctrl+C, then Ctrl+V to paste
• Recolor — Use color picker in Colors panel

Keyboard Shortcuts

Key	Action
Click	Select single atom
Ctrl/Cmd+click	Add/remove from selection
Ctrl+A	Select all atoms
Ctrl+I	Invert selection
Esc	Deselect all
Delete/Backspace	Delete selected
Ctrl+C	Copy selected atoms
Ctrl+V	Paste atoms
A	Enter add atom mode
D	Delete mode
V	Select mode