The plugin row is ocr-free; the settings card edits these fields live (no restart):

field	default	meaning
`engine`	`auto`	`auto` prefers Vision, falls back to tesseract; a pinned engine reports its own failure instead of silently switching
`langs`	`[]`	`[]` asks for nothing in particular — see the language note below
`fast`	`false`	the fast recogniser; Latin-only
`detectLanguage`	`false`	let Vision guess the language too; costs 0.2–0.9 s per image
`maxChars`	`40000`	truncate the rendered text (0 = no cap); truncation is always announced
`lowConfidence`	`0.7`	below this, lines are listed separately (0 = no section)
`timeoutMs`	`120000`	per-image engine budget
`dir`	`""`	engine build directory; `""` means `~/.dsh-ocr-free`
`includeEngineLine`	`true`	the header with engine, timing and warnings

dsh-ocr-free

安裝