Although equations can be used to define the sketch in the Catalog Feature, only the actual parameter values will be inserted with the sketch, and any formulas will be lost. This prevents creating a catalog feature whose dimensions will automatically adjust to existing parameters within a part. If you need the Catalog Feature to use a formula or part value, you must edit the Catalog Feature parameters after insertion and change the equations to formulas or part values.
In this tutorial we will cover taking a sketch of a Raised Panel cutter profile, and create a sketch Catalog Feature. That cutter profile can then be inserted into a part model, and be used to create a new feature based on the sketched profile. Another Instructable will use this sketch Catalog Feature to create a Raised Panel part with this profile defining the raised panel profile.
If you want to create a sketch Catalog Feature from an existing sketch that is already used to create a Feature, you must first delete that Feature to allow the creation of the Catalog Feature. Just make sure the part is saved that contains the desired sketch, delete the feature that uses the sketch, create the Catalog Feature, and then quit WITHOUT saving the changes to the part file.