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There's a strategy of making an 'expanded scale meter'. Place an opposing voltage (or voltage drop) inline with your source. Say 90 mV. Then your readouts span a range 10mV to 40mV.

Or say your source is 1V. That's great enough that you might take a plain diode and install a resistive divider across it. Tap wherever it yields a usable range. A diode is its own voltage regulator. Or add another diode in series.