Hi, some libraries (Gem, pdp...) use abstractions. I wonder if their paths should be included in the startup paths in pd extended. Or if one should create objects with the "Gem" prefix (for example Gem/pix_blobtracker). the problem with some abstractions is, that they have also a help patch. and rightclick - help then opens the abstraction and not the help patch (if the path is included in the default paths). otoh, many helppatches and abstractions do not work without the paths given, because they have no prefix... marius.