# Interactive Selection

Items (like atoms or bonds) can be selected by clicking on them with the left or middle mouse button. Doing that will normally deselect all other items of the same class. To prevent that, hold down either the Shift or the Ctrl key must be pressed on the keyboard while making the selection.

For text annotations there is a difference between the function of the left and middle mouse buttons: the left mouse button only selects texts if their bottom-left corner is the nearest item, while the middle mouse button gives priority to texts and selects them whenever the position is within the text.

See the section on Mouse Manipulations for a more detailed description on how to use the mouse.

Last modified: Mon Jan 20 19:44:56 CST 2003