Keyboard shortcuts

All shortcuts apply to the interactive viewer. Press h or ? in the viewer for the live help screen — that's the authoritative reference.

Navigation

The u / d and Ctrl paging aliases follow less / vim muscle memory. N is an alias for p everywhere n / p step (search matches, pages, chapters, frames).

Views and modes

Text views

Search defaults to exact-substring; press Ctrl-R in the prompt to switch to a regular expression (the prompt title shows Search (literal) or Search (regex)). Either way matching is smart-case: an all-lowercase query matches case-insensitively, any uppercase character makes it case-sensitive. Type the query and press Enter to run it — the viewer jumps to the first match. n / p cycle through matches (wrapping at the ends); the status line shows cur/total, prefixed with regex while a regex search is active. A malformed regex shows the parse reason and keeps your previous search. Regex matches one line at a time, so ^ and $ anchor to line bounds and a pattern can't span a line break. Esc while a search is active clears the matches (press it again to leave the viewer); an empty-query Enter also clears the search.

On very large files the text view and the CSV / SQLite table view scan the first 256 MB per query so the viewer never freezes for a multi-gigabyte read; a capped scan marks its counts as partial (12/3400+, no match (partial scan)) and raises a warning.

The same / search works in the rendered HTML view, the EPUB, DOCX / ODT / RTF, and PDF read views. In the EPUB Read view n / p normally step chapters — while a search is active they navigate matches instead, and Esc clears the search to get chapter stepping back.

Image views

Zoom anchors on the viewport centre — the pixel under the centre stays put across + / -. The same zoom keys work in animation, PDF / CBZ, and font specimen views. See Zoom & pan for full behaviour.

Animation views (GIF / WebP / animated SVG)

Listings (archives, PDF embeds, audio embeds, ISO, directories)

Backspace walks up a directory. In an on-disk directory listing it opens the parent directory with the cursor on the subdirectory you came from (so repeated presses climb the tree and you can step straight back in). In an archive / container TOC (zip, tar, ISO, epub, …) it moves the selection onto the parent directory row — directory rows are selectable, so the cursor lands right above their contents and each press climbs one level.

z toggles the size column between exact byte counts (thousands-separated) and human-readable units (KiB/MiB/GiB); the status line shows human sizes while the latter is active. Exact bytes are the default, and --list / --print output always stays exact.

Listing search matches the last path segment of each row only — sub/ finds nothing because no leaf carries a slash. Directory leaves participate so a search for an ancestor name brings that subtree into view; the file selection only moves when the active match lands on a file row, so Extract / Descend still target a descendable entry.

CSV / TSV table

CSV search is scoped to a single cell — a query that would span the delimiter between two columns yields nothing. n / p cycle through matches and pan / scroll to bring each match's cell into view.

Multi-page / multi-chapter (PDF, EPUB, CBZ)

Font specimen (multi-face .ttc / .otc)