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After you have uploaded drawings, you can link them together to make navigation on the app a bit easier.
To set up the links, go to Link > Link Drawings, or the Plan Viewer set up mode directly.
If you have a lot of drill downs to set up on a drawing, you have the option to select confirm and add next to speed up your set up process.
Confirm!
You can Move/Edit/Delete the drilldown by clicking the existing drilldown on the setup mode.
Learn how to link drawings automatically.