Automation Editor
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Building Automations
Subroutines
Versions
1min
To view a subroutine's versions, right-click on it in the catalog and choose the "versions" option:

All saved versions of the subroutine are displayed:

Upon clicking a version from the list, the system will ask if you want to open that version, or to compare that version with the latest version:

See the section Comparing Versions if you want to compare subroutine versions.