Welcome page and Program overviewTools and toolbarsThe Contextual menu and the Selection The Display settings

The click right on the viewer window gives access to the contextual menu. There are various submenu on it, including the "SELECTION" submenu, which opens possible selection methods (such as select all atoms, invert selection). In this submenu there is also a shortcut to the Advanced Selection Tool

Many entries of the contextual menu are self-explanatory. "Toggle" actions means that if one corresponding object is already present (such as label, thermal ellipsoids, axis system..), then all are deleted, but if none is present, they are all showed.
"SYMMETRY OPERATIONS" submenu gives actions related to symmetry operations and crystal packing :  generate symmetry mates to fill unit cell, show possible symmetry equivalent molecules center-of-mass positions etc...
"CONSTRAINTS" submenu permits to show all electron density constraint of one type (valence, multipolar, kappa) at one time, and to remove them all. They are an alternate ways to show constrains than using the main toolbar buttons.
"MEASUREMENTS" submenu allows to hide the last measurement (distance, angle ....) or to remove all of them.
"WATER MOLECULES" and "HYDROGEN ATOMS" submenus allow of course to show/hide water molecules or hydrogen atoms, respectively.
  


When atoms or critical points are selected, the "SELECTED ATOMS" and/or "SELECTED CPs" submenu become available, and give access to actions that will be performed on selected objects only.



Again the various entries are rather clear, only the "CONSTRAINTS" entry needs some explanations. It opens another submenu allowing to toggle various constrains, but also to create electron density constrains using the "constrain charge density" option. choosing this option opens the "Constrain maker" dialog window, which will allow the user to constrain together all currently selected atoms electron density valence, multipolar and/or kappa/kappa prime parameters. The created constrains will be written in the selected CONSTRAIN MoPro file.





The selection itself corresponds to a list of selected atoms. They are visible on screen as they are surrounded with a colored shape, on the below image for instance, 8 atoms are selected and surrounded by purple wires.



The number of currently selected atoms is always written in the top right corner of the Viewer. Atoms can be selected and added to the selection using left mouse button click on atoms, using the selection rectangle (see program overview), using shortcuts such as "Select All" from contextual menu, using the "Advanced Selection Tool" or using the "Object tree". On the example below the atoms NT, H1 and H3 have been selected from the tree.



The selection can be saved at any time using the "SELECTION" submenu then "Save current selection" option. The saved selection can afterward be recalled (erasing the current one) or added to the current selection.