To calculate the distance between two atoms:Click/Enter these
atoms. Clicking them will input their names into the dialog
box. Click Execute to calculate the distance.
Bond Angle Structure > Bond angle.
To measure a bond angle, three atoms need to be selected so
that the angle can be measured between them. A dialog box opens.
Click on the atoms of interest or enter their names in each
text field. Select Execute to calculate the angle.
Angle Structure > Dihedral Angle
Just as described in Measure Distance and Bond
Angle, open the dialog box and click/enter the atoms
of interest. Dihedral angles require 4 atoms of interest.