Video: Create Additional Mappings

Steps

Select the display, and open Mapping in the Inspector.

Pick the mapping type from the dropdown. For a flat screen, choose Planar — the other types describe projection geometry a display does not have.

Now click Create. Then click the E to edit the new UV-Mapping

It arrives named after its type — Planar 2. Give it a name that says what it does instead. Months from now you will pick this from a dropdown, where "Bottom left" beats "Planar 2".

Now adjust Mapping Position, Rotation and Scale until the content sits where you want it.

If you just need a rough size and position, you can use the Grips in the scene view to Scale and move the new mapping.

For more precise positioning, you can check the Pixel Values checkbox, enter the total resolution under Total Canvas Resolution, and then the size of the mapping you want to create under Sub Canvas Size.

Using the Sub Canvas Position you can then move your mapping around exactly where you need it

Click Apply to commit it. Edits are not applied by default if you save the Project— anything unapplied is discarded at the next Backstage restart.

In the Sequencer, select a video channel, and open Destination.

Tick the display, then pick your new mapping from the dropdown beside it. The channel's track now names both — the display, and the mapping it renders through. A channel still on the default is unaffected.