The playlist, the timeline, in and out points, speed, zoom, and the formats the player opens, camera RAW and Flash included.
The Playlist tab of the Media & Session panel holds the clips of the review, in order.

.bpl, .otio, .csv, .json or .edl. You can also drag files and folders from your file manager.Ctrl+click and Shift+click pick several rows, starting from the clip on screen; a right-click on the selection gives one menu: Delete N shots (after a confirmation), Open N folders, Copy N paths and Set N shots to a status.Page Up and Page Down, or double-click a row. Continuous Playback (Play All) runs on from one clip to the next instead of stopping at the end of each.Delete or Backspace, with the mouse over the list, removes the selected clips, or the clip on screen when nothing is selected. Notes and drawings follow the media: add the file again and they come back.A file opened from your file manager (double-click, Open with) goes to the player already open: it is added to its playlist and shown, without starting a second player (Open files in the running player, in Edit > Preferences... > General, turns this off). If no player is open, it starts with a new playlist holding that file alone. An unreadable format is refused and named in the Unsupported Format window.

The numbers refer to the capture.
1001 (Edit > Preferences... > General > Default Start Frame). Double-click it to change it: this renumbers the whole clip, it trims nothing. The same number is used everywhere: exports, notes, sessions and trackers.To set the range:
I or [ sets the in point on the frame on screen, O or ] the out point. \ goes back to the whole clip.Alt and drag anywhere: the nearer point follows the mouse.Shift+I and Shift+O open a box where you type the frame number (1012) or an offset (+12, -8). Enter applies, Escape cancels.View > Display in Timecode shows time as timecode instead of frame numbers.
L or the play button plays forwards, J backwards, K stops.24.00 fps) changes the speed: drag it, double-click to type a value, or right-click for the common rates. It works the same in Essential.24 by default) when it is added. Movies keep their own rate.Ctrl+L turns looping on or off.M mutes the sound. In A/B, each track's speaker chooses which sound you hear; Ctrl+click a speaker to hear both.F fits the picture to the window, Alt+F opens the zoom menu. Alt+1, Alt+2 and 4 zoom to 100%, 50% and 25% (without Shift, even on AZERTY); bare 1 / 2 / 3 set the shot's status (Not Approved / Pending / Approved) and go to the next shot. Home re-centers the picture.X flips the picture horizontally, Shift+X vertically.F11, the fullscreen button or View > Fullscreen enter and leave fullscreen; Escape leaves it. In fullscreen, T shows or hides the timeline. By default a double-click on the picture never enters fullscreen, so two quick taps of a pen never change the window; Double-click on the picture: fullscreen, in Edit > Preferences... > Appearance, gives it back.| Family | Formats |
|---|---|
| Image sequences | OpenEXR (multi-part and AOVs included), DPX, TIFF, PNG, JPEG |
| Review copies | NOVA .nvfx, the player's review format (see Notes and export) |
| Movies | MOV, MP4, MKV, MXF, and what the FFmpeg shipped with the player reads |
| Camera RAW (Windows) | RED .r3d, Blackmagic RAW .braw, ARRIRAW .ari and .mxf |
| Flash | video and vector .swf |
Multi-layer EXR. A multi-part EXR is detected on its own and a notice on the picture says so. The track's Layers / AOV list picks the pass on screen; switching passes keeps the frames already in memory.
NOVA (.nvfx). The player's review format, which it writes itself on export. A .nvfx sequence opens like any image sequence, with the Layers / AOV list: each layer of a multi-part EXR is kept on its own, and switching layers reads that layer alone. It is not an interchange format: between applications EXR stays the rule, and the export writes EXR back from a .nvfx sequence.
Camera RAW. RED, Blackmagic RAW and ARRIRAW files play without transcoding in the Windows version; Linux and macOS: coming soon. Debayering runs on the graphics card when Enable Hardware Decode (Beta) is ticked (see Memory and performance). Help > About..., section Color and versions, says which RAW SDKs your version carries.
Flash (.swf). A video SWF plays like a movie. A vector SWF (an animatic, an animation test) is first rendered once to frames by Ruffle's exporter, in the background; a notice counts the frames as they are drawn, then the clip appears in the playlist and plays, grades, annotates and exports like a sequence. The installers put the exporter next to the player; Preferences > General > Flash (SWF) says whether one was found and lets you choose another.
Metadata. The Inspector's Metadata tab lists the file's metadata, with a search; in A/B it shows A and B side by side.
Going further: the complete manual, parts 3, 6.1 and 9 (Help > User Guide).