Update cheatsheets

osx/screencapture

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+---
+syntax: markdown
+tags: [tldr, osx]
+source: https://github.com/tldr-pages/tldr.git
+---
+# screencapture
+
+> Utility to take screenshots and screen recordings.
+> More information: <https://keith.github.io/xcode-man-pages/screencapture.1.html>.
+
+- Take a screenshot and save it to a file:
+
+`screencapture {{path/to/file.png}}`
+
+- Take a screenshot including the mouse cursor:
+
+`screencapture -C {{path/to/file.png}}`
+
+- Take a screenshot and open it in Preview, instead of saving:
+
+`screencapture -P`
+
+- Take a screenshot of a selected rectangular area:
+
+`screencapture -i {{path/to/file.png}}`
+
+- Take a screenshot after a delay:
+
+`screencapture -T {{seconds}} {{path/to/file.png}}`
+
+- Make a screen recording and save it to a file:
+
+`screencapture -v {{path/to/file.mp4}}`