Schedule:file in openstudio

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Can we add a schedule file in OpenStudio without using a measure? In OpenStudio, I can load the schedule file, but I cannot apply it, or I may have missed something. When using a measure, I was able to apply the schedule file. But without using the measure, after loading the schedule file in OpenStudio, I assumed it should appear in the library on the right side, but I could not find it.

Is there a way to apply a loaded schedule file directly in OpenStudio without using a measure? Also why cannot I add the schedule file on Schedule Sets?