Using this setting, the Arrow/Reaction/Atom Map button has dual function: when you click on the canvas, it places a + sign, when you drag with it, it puts a reaction arrow.

To place a reaction arrow

• • Select the Arrow/Reaction/Atom map button. You will see the reaction arrow on the tip of the cursor when you move the mouse into the canvas area.

  • Click the location of the tail of the arrow.

  • Drag the mouse and release at the location of the head.

To place a +

• • Select the Arrow/Reaction/Atom map button.

  • Click on the canvas.

Reaction arrows snap every 7.5 degree. Pressing 'Shift' enables the free rotation of reaction arrows.

You can place reaction arrows/plus signs on the canvas at any time, even on a blank canvas.

Align/distribute

You can align and/or distribute the objects of the reaction scheme by selecting the relevant option in Edit > Object menu.

The centers of the objects will be considered during the alignment/distribution of objects. Note that selected agent fragments and texts are moved together with the arrow while keeping the distance between them.