You can change which features are included as part of an analysis library feature in the library feature part or assembly document (*.sldalprt and *.sldalasm respectively):
To add another analysis feature, right-click the feature to add, and select Add To Library.
To remove an analysis feature, right-click the feature, and select Remove From Library.
You can edit an existing library feature and save it with a new name (and extension) to create additional, similar library features.
After the library feature is inserted into a part or an assembly document, you can edit a library feature using the same techniques that you would use to edit any load or restraint.
Adding Analysis Library Features to a Document
Creating Analysis Library Features
Deleting Analysis Library Features
References and Values with Analysis Library Features