This is a topic that has been raised multiple times; almost everyone experiences this confusion when they first start learning SPICE simulation. Mike did not include polarity notation in LTspice for resistor, and this practice has carried forward. Personally, I think adding a ‘+’ sign or a dot to a resistor just makes the schematic more cluttered. My own practice is to either place a new resistor (directing current from top to bottom) or rotate it once (directing current from left to right); I believe advanced users all follow similar practices.
In addition, the lack of notation on resistors ensures that beginners go through the ‘painful’ process of learning how SPICE defines current direction, especially since this generation learn SPICE through GUI instead of netlist.
This forum serves the purpose of community support. All feature requests or bug reports should be emailed to Mike; his email address can be found under Help > About Qspice.
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