Strips are particularly useful when doing assignments. Basically it is a way of seeing several parts of a 3D spectrum next to one another at differing z-planes (see Visualising 3D Spectra for more information on strips). To manage your strips click Strips in your Spectrum Window Toolbar. + will add strips. The strips are numbered (top right hand corner) and the z-plane is displayed in the bottom left hand corner of each strip. There is a button for each strip and the active one is coloured green. – will remove the active strip and Clear will remove all strips. Left and Right will move the active strip one place to the left or right; in this way you can change the order of your strips. Note that if you navigate from another window into a window containing strips, you will navigate to the active strip.