• Buffers — mutating actions create a new buffer, letting you jump up and down your analysis history.
• Delimiter swapping — swap between CSV, TSV, space-aligned, JSON, regex with named capture groups, and raw mode with D.
• Column delimiters — split a column into more columns using JSON, regex, or string delimiters with d.
• Filtering — filter by column (f/F), exclude (e/E), across all columns (|), or from a search (&).
• Sorting — toggle ascending/descending sort on any column with s.
• Searching — search (/), search by cell value (*), navigate matches (n/p).
• Pivoting — group records by composite key with U, focused summary view, dive into grouped data with enter.
• Column management — show/hide columns (C), reorder columns (</>).
• JSON extraction — promote nested JSON fields to columns with J.
• Shell commands — run a shell command and pipe its output into a new buffer with !.
• Tail mode — keep the cursor at the bottom as new data arrives with t.
• Output — write buffer contents to a file or stdout (W), copy cell values (y).
• Themes — 10 built-in color themes (Dracula, Nord, Gruvbox, etc.) plus custom theme support, switch with T.
• Arrival timestamps — every row records when it was received. Toggle the _arrival column with A.
• Time window filtering — show only recent rows with @ (e.g. 5m, 1h). Append + for rolling windows. Prefix with a column name to filter by parsed timestamps (e.g. timestamp 5m).
• Timestamp parsing & conversion — auto-detects datetime columns (epoch, ISO 8601, syslog, etc.) for type-aware sorting. Convert formats with @colname -> target (epoch, iso, relative, strftime, with optional timezone conversion). Also available from the CLI with --format-timestamp / -F for batch pipelines.
• Raw pager mode — --raw or auto-detected. A fast virtual-rendering pager for unstructured text, handling million-line files without columnar overhead.
• Excluded lines — view lines that failed to parse or were removed by filters with ~, with chained accumulation across buffers.
• Pipe mode — use nless as a pipeline stage. Interactive exploration with Q to pipe and exit, batch mode with --no-tui, or --tui to force interactive mode.
• Mouse support — click column headers to sort, double-click pivot rows to drill in, right-click for context menus, navigate via the menu bar.
• Merge files — combine multiple files into a single view with a _source column using --merge.

Buffers:

• [1-9] - select the buffer at the corresponding index
• L - select the next buffer
• H - select the previous buffer
• q - close the current active buffer, or the program if all buffers are closed
• Q - pipe current buffer to stdout and exit immediately (pipe mode shortcut)
• N - create a new buffer from the original data
• r - rename the current buffer
• M - merge the current buffer with another buffer

Groups:

• } - switch to the next buffer group
• { - switch to the previous buffer group
• R - rename the current group
• O - open a file in a new buffer group

Navigation:

• h - move cursor left
• l - move cursor right
• j - move cursor down
• k - move cursor up
• 0 - jump to first column
• $ - jump to final column
• g - jump to first row
• G - jump to final row
• w - move cursor right
• b/B - move cursor left
• ctrl+u - page up
• ctrl+d - page down
• c - select a column to jump the cursor to

Column visibility:

• C - prompt for a regex filter to selectively display columns, or all to see all columns
• m - pin or unpin the current column to the left side of the screen
• > - move the current column one to the right
• < - move the current column one to the left
• A - toggle the _arrival metadata column showing when each row was received

Pivoting:

• U - mark the selected column as part of a composite key to group records by, adding a count column pinned to the left
• enter - while over a composite key column, dive into the data behind the pivot

Filtering:

• f - filter the current column and prompt for a filter
• F - filter the current column by the highlighted cell
• e - exclude from the current column and prompt for a value
• E - exclude the current column by the highlighted cell
• | - filter ALL columns and prompt for a filter
• & - apply the current search as a filter across all columns
• @ - set a time window to show only recent rows (e.g. 5m, 1h); append + for rolling; prefix with column name for column-based filtering (e.g. timestamp 5m); use -> for format conversion (e.g. timestamp -> relative)

Searching & Highlighting:

• / - prompt for a search value and jump to the first match
• * - search all columns for the current highlighted cell value
• n - jump to the next match
• p - jump to previous match
• + - pin the current search as a persistent highlight
• - - navigate or manage pinned highlights

Output:

• W - prompt for a file to write the current buffer to (- writes to stdout)
• y - copy the contents of the currently highlighted cell to the clipboard

Shell Commands:

• ! - run a shell command and pipe its output into a new buffer

Tail Mode:

• t - toggle tail mode
• x - reset new-line highlights

Sessions & Views:

• S - open the session menu (save, load, rename, delete)
• v - open the view menu (save, load, rename, delete)

Themes & Keymaps:

• T - open the theme selector
• K - open the keymap selector

Excluded Lines:

• ~ - view excluded lines (parse failures + filtered rows), with chained accumulation

Sorting & Aggregations:

• s - toggle ascending/descending sort on the current column
• a - show column aggregations (count, distinct, sum, avg, min, max)

JSON:

• J - select a JSON field under the current cell to add as a column

Delimiter/file parsing:

• D - swap the delimiter on the fly (common delimiters, regex with named capture groups, raw, json, or for double-space aligned output like kubectl)
• d - split a column into more columns using a columnar delimiter (json, regex with named capture groups, or any string)
• P - auto-detect a known log format and apply it as a regex delimiter

Help:

• ? - show the help screen with all keybindings

Mouse:

• Left-click column headers to sort
• Double-click pivot rows to drill in
• Right-click cells, headers, tabs, or groups for context menus
• Click buffer tabs or group bar to switch
• Menu bar for mouse-driven access to all actions

See the full keybinding reference and tutorials for more.