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There is an (Un)Comment selection and the shortcut is Ctrl+/ either for commenting or for uncommenting a line.

Format Document (Shift+Alt+F) - Format the entire active file. Format Selection (Ctrl+K Ctrl+F) - Format the selected text.

Select Preferences > Beautifier > Artistic Style, ClangFormat, or Uncrustify > Format Current File to format the currently open file. You can create keyboard shortcuts for the functions.

Assign keyboard shortcuts Select Preferences > Environment > Keyboard. Select a command from the list. In the Key Sequence field, you have the following options: ... To assign multiple keyboard shortcuts to a function, select Add, and enter or record an additional key combination.

Select Preferences > Beautifier > Artistic Style, ClangFormat, or Uncrustify > Format Current File to format the currently open file. You can create keyboard shortcuts for the functions.

To automatically indent the highlighted text, select Auto-indent Selection or press Ctrl+I. To automatically format the highlighted text, select Auto-format Selection or press Ctrl+;.

Is Qt Creator free? There is an open-source license which is free and a commercial license. The commercial license (Qt creator and Qt SDK) starts at $459/month.