You can do both—we support associating multiple models by discipline and by project location! We only require that your models are on the same common coordinate system before you upload them to OpenSpace. For more information on this process, check out our Support article. Note: We don’t currently support manually aligning models to one another. (Again, you must establish a common coordinate system for all models in the source file prior to upload.) If you’d like the ability to manually align models to one another in OpenSpace after upload, you can submit that request to your OpenSpace representative so we can consider adding it to the roadmap.