Many of you know this one, but many don’t – so I will show it here.
If you are entering input manually one of the fastest ways to do it is to use the ENTER key to copy input from the line above. For example, if you have a line of input that looks like this:
And the next line is the same except it is 1 1/4 diameter, just hit enter under the Nodes and they each will be incremented by one. When you get to the Diameter column, type in 1.25 or press the F2 key to get that. Then hit enter under each of the remaining columns to bring down the value above it.
Some rules:
1. If you do not want to copy what is directly above a particular column, just use the arrow key to go right instead of the Enter.
2. Fittings do not copy down.
3. The copy down only happens into an empty field. If you already have something there, it will not be overwritten.
4. The copy down only works on items directly above. If there is a blank, then no copy down will happen.
The H-Factor 
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