we can not continue to make sketching, for example we have to use Line commend again and again to create multi line. so we need help
if you click the graphic area, drag and release you will make one line. If you click the graphic area and move your mouse cursor and click again you can continue.
Also check if you have "single command per pick" on
You could also use the line shortcut( press L) or press the enter key to reuse your last command.
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