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For a long time, AutoCAD has an Express Tools Command called BREAKLINE that allows you to quickly draw break lines to show stairs or other elements that should be represented with this symbol. Got a question recently on how to control the size of this BREAKLINE, and the truth is that it is very simple.
To Draw the breaklin you type BREAKLINE an ENTER, then, if you look at the command you will see this text:
If you need more info about the BREAKLINE command, you can also check this old post from 2009.