deletions | additions       diff --git a/Hello World.tex b/Hello World.tex  index 14f3a20..df05de9 100644  --- a/Hello World.tex  +++ b/Hello World.tex 
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  Leave your cursor anywhere in that line (in doesn't matter if beginning, middle, or end). Press [ctrl+Enter] to evaluate the code. ``Hello world'' appears in the Post window. Congratulations! You've just written and executed your first SC program.  \bigskip  \fbox{  \parbox{0.86\textwidth}{ \parbox{  TIP: Throughout this document, ctrl (control) indicates the modifier key for keyboard shortcuts that is used on Linux and Windows platforms. On Mac OSX, use cmd (command) instead.  }  }