Dynamic view of bpatcher

The bptatcher object allows you to show a view of a portion of a subpatch inside the main patch.

You can change the visible portion of the bpatcher with an offset message to a thispatcher object in the bpatcher's subpatch, and you can change the size of your bpatcher with a script size message to a thispatcher object in the parent patch.

Here we use the offset message to choose which of two dials we want to see in the subpatch, and we also show how the script size message can allow us to see all, or only half, of the subpatch.

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