Update cheatsheets

mutool

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mutool
+
+> Convert, query information and extract data from PDF files.
+> More information: <https://mupdf.readthedocs.io/en/latest/mupdf-command-line.html>.
+
+- Convert a range of pages to PNGs (Note: `%nd` in the output placeholder must be replaced with a print modifier like `%d` or `%2d`):
+
+`mutool convert -o {{path/to/output%nd.png}} {{path/to/input.pdf}} {{1-10}}`
+
+- Convert one or more pages of a PDF into text in `stdout`:
+
+`mutool draw -F txt {{path/to/input.pdf}} {{2,3,5,...}}`
+
+- Concatenate multiple PDF files:
+
+`mutool merge -o {{path/to/output.pdf}} {{path/to/input1.pdf path/to/input2.pdf ...}}`
+
+- Query information about all content embedded in a PDF:
+
+`mutool info {{path/to/input.pdf}}`
+
+- Extract all images, fonts and resources embedded in a PDF to the current directory:
+
+`mutool extract {{path/to/input.pdf}}`
+
+- Show the outline (table of contents) of a PDF:
+
+`mutool show {{path/to/input.pdf}} outline`