diff --git a/docs/JFJOCH_VIEWER.md b/docs/JFJOCH_VIEWER.md
index 1400fc54f..7483e713e 100644
--- a/docs/JFJOCH_VIEWER.md
+++ b/docs/JFJOCH_VIEWER.md
@@ -26,8 +26,9 @@ time, as the release is not yet notarized by Apple.
 - Opens HDF5 files written by [`jfjoch_writer`](JFJOCH_WRITER.md) (`*_master.h5`) and the
   `*_process.h5` files produced by [`rugnux`](RUGNUX.md). It also opens NXmx files
   written by DECTRIS detectors, though that path has had only limited testing.
-- Opens PILATUS miniCBF rotation sweeps. These store one frame per file, so naming any frame opens
-  the whole sweep it belongs to. A raw CBF carries the images and the geometry but no analysis
+- Opens PILATUS miniCBF, marCCD and SMV rotation sweeps (the formats listed under
+  [What Rugnux reads](RUGNUX_FORMATS.md)). These store one frame per file, so naming any frame opens
+  the whole sweep it belongs to. A raw frame carries the images and the geometry but no analysis
   results, so the spot, reflection and per-image plot panels stay empty until something is computed.
 - Runs an **embedded data-processing pipeline** — the same analysis code as the rest of
   Jungfraujoch — performing spot finding, indexing and integration on the displayed image, with the
@@ -220,7 +221,7 @@ keyboard without them `Home` / `End` are `Fn`+`←` / `Fn`+`→` and `Page Up` /
 
 ## Opening data
 
-- **File ▸ Open** (`Ctrl+O`) — open a local HDF5 file, or any frame of a miniCBF sweep.
+- **File ▸ Open** (`Ctrl+O`) — open a local HDF5 file, or any frame of a miniCBF, marCCD or SMV sweep.
 - **File ▸ Open HTTP** (`Ctrl+H`) — connect to a `jfjoch_broker` HTTP endpoint to follow a live
   collection. The dialog defaults to host `localhost` and port `8080`; these defaults can be
   overridden with the environment variables `JUNGFRAUJOCH_HTTP_HOST` and `JUNGFRAUJOCH_HTTP_PORT`.