Navigation:  Calculation Modules > Analysis > ENERCALC 3D > Ribbons > Create > Generate Loads > Response Spectra Library

Create > Generate Loads > Response Spectra Library prompts you with the dialog below.  

 

 

 

It allows you to define spectra for current and future projects.  You can then use one or more spectra in  Analysis > Response Spectrum Analysis.

 

You may view/modify a user-defined spectrum by double clicking the spectrum.  

 

 

 

The first spectrum can not be edited or deleted.  Spectra generated based on building codes cannot be edited but can be deleted.