The Editor inserts the proper syntax for comments based on the programming language you are using. If the Editor is not using the correct syntax, choose View > Language to make sure it is set to the correct language. Block comment operations are not supported in FORTRAN or Green Hills Script.
If you want to uncomment a comment block, highlight the block and choose Block > UnComment or right-click the selected block and choose Uncomment from the pop-up menu.
If you want comments in your code to stay flush-left even when you auto-indent your code:
Note: If you insert # as the first character of a comment, then the comment will move to the left margin regardless of the position where you started the comment. For example, if you are coding in C and enter /*#, then the comment automatically moves to the left margin.