Athanor by arbastro
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How to select atoms, structures and objects

Press V. Click takes a whole structure, Marquee (M) takes only the atoms inside the box you drag, and Lasso (L) takes whatever you draw around. Select all is Ctrl+A, and Shift+click adds to the selection.

On a Mac, Ctrl is Cmd.

Steps

  1. Press V for the Select tool. The row above the toolbar shows its three ways to select: Click, Marquee and Lasso.

  2. Pick one:

    • Click (V): click a structure to select all of it, or an arrow, text or shape to select that.

    • Marquee (M): drag a box. Only the atoms and objects inside it are selected, so you can take part of a structure.

      Dragging a marquee over part of a row of structures.Dragging a marquee over part of a row of structures.

    • Lasso (L): draw a loop around what you want, for odd shapes a box cannot fit.

      Drawing a lasso loop around one structure.Drawing a lasso loop around one structure.

  3. The selection shows in orange, with a bar of actions above it: align, flip, rotate, group, lock, copy and more.

More ways to select

To Do this
Select everything Ctrl+A
Add to the selection Shift+click
Pick one atom, or one member of a group Ctrl+click
Select atom by atom Ctrl+drag
Select a whole reaction Double-click its arrow
Select nothing Esc

You can also select by clicking rows in the Layers panel.

Selection and arrangingHow to align and space structures evenlySelect at least two things (three to space them) and use Object › Align and space, or the Ctrl+Shift+Alt shortcuts: L, C and R align left edges, vertical centers and right edges; T, M and B align tops, horizontal centers and bottoms; H and V space evenly across and down.Selection and arrangingThe Layers panelLayers (Shift+L) lists every structure and object on the page, structures first, each with its formula and molecular weight. Click a row to select it, double-click a structure to name it, and use the eye to hide it.Getting startedThe Athanor windowThe drawing tools are in the toolbar at the bottom, panels sit at the left and right, documents open in tabs, and the Athanor mark at the left of the tab bar opens the Main menu (File, Edit, View, Insert, Object, Help).

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Last updated Nov 12, 2026