- Folders: a Movie, Grid and List switch shows a folder's FITS files as a movie, a grid of thumbnails, or a sortable table you can export as CSV. - Stepping through a folder's movie is faster. - Spotlight and Get Info now show FITS metadata in the App Store version. - A Colorbar button beside Limb turns the colour bar on and off. It is off by default. - Fixed: PUNCH units now read as a multiplier, "× 2.009e+07 W/(m2 sr)", instead of a second number.

HelioFITS is now HelioFITS Peek, with a new icon: the AIA 171 Sun in a file outline. • Header drawer in Quick Look: open the header beside the preview, narrow it to Time, Instrument, WCS or Exposure, and pin the keywords you care about. • Filters: RHEF, MGN and WOW in Quick Look and the viewer, with a swipe to compare against the unfiltered image. The readout always reports the raw data. • RHEF controls: Shadows and Highlights sliders, a Reveal wipe, and Save RHEF PNG. • Solar coordinates: plane-of-sky rings and position-angle spokes, and Compare to line up two files by helioprojective coordinates (swipe, blink or side by side). • Movie mode: open a folder to play its FITS files in time order, with a scrubber and optional running difference. • Saved PNGs record how they were made (layer, colormap, limits, stretch, filter), and Copy Python reproduces what is on screen. • Finder thumbnails show the instrument and wavelength, and mark files with several layers. • Keyboard readout: Option-arrow moves a crosshair; Option-Shift-arrow measures a box. • Optional colorbar with typed limits and histogram handles (Settings > Colorbar). Fixes: RHEF no longer draws stripes over flat regions such as PUNCH's occulter, PUNCH units read as a scale factor, and Quick Look refuses oversized or compressed files safely.

• Opening HelioFITS now opens the viewer: drop a FITS file on it, or click Open…. The welcome page appears beside it until you tick “Don’t show this again”, and the layer settings moved to Settings (⌘,). • The viewer can show its file in Finder (⇧⌘R) and copy its full path (⌥⌘C). • Copy Python now names the array (data = m.data) and, with RHEF on, reproduces the filter with sunkit-image.

• Files with more than eight image extensions are no longer cut off; up to 128 are now shown (reported with 12-extension UCoMP files). • The icon no longer sits on a grey plate at small sizes on macOS 26. • The About panel now says what HelioFITS is and points to HelioFITS Studio, our separate desktop application for coronagraph and wide-field imagery.

Fixes the “Open a Finder Window” button, which failed with a permissions error instead of opening anything. Fixes the Proba-3/ASPIICS colormaps added in 1.3, which could never actually be selected. Green line, He I D3, polarised brightness and total brightness now each get their own colour table, verified against real files from the P3SC archive.

Fixes a bug that displayed every image upside down. Adds colormaps for Solar Orbiter/EUI and Proba-3/ASPIICS. The statistics panel now draws a histogram with your clip range marked on it, so you can see how much of the data a stretch is throwing away. The brightness sliders work while the RHEF filter is on. File ▸ Open lets you pick a FITS file directly, and the clip sliders are logarithmic, which makes the low end actually adjustable.