Rotating a display to portrait now switches to your portrait artwork instead of turning the landscape version on its side.
Portrait masks display upright at 90° / 270°. On panels that can rotate, picking a portrait mask and rotating the display used to spin the whole landscape layout sideways. Now the app loads the portrait version of your content and composes it upright — the way the original Windows app does — so masks, backgrounds, and overlay text stay aligned and nothing gets clipped.
Saving a theme while rotated saves it in the right orientation. A theme you save at 90° / 270° is now stored as portrait (and a landscape one as landscape), so it comes back exactly as you saved it the next time you load it — no more themes reloading in the wrong orientation.
Under the hood this restores the original per-orientation content model the app was built on, with the whole change covered by tests and verified on a real rotating panel. Note: Thermalright ships far fewer portrait masks (5) than landscape ones (110) — that's the vendor's catalog, not a bug in this release.
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