To get more sensitivity from the sliders in the Develop module in Lightroom, expand the right panel track so that it’s much wider than the default. The “wider sliders” will allow finer adjustment with your mouse. To stretch the panels, position your mouse over the edge of the panel track. You will see the cursor change to a horizontal set of arrows separated by a vertical bar. Click and drag to stretch the panel track.

You can also adjust the slider values by using the up and down arrows on your keyboard; just make sure your cursor is over the chosen slider (the name of the adjustment will light up) and press the up and down arrow keys to adjust the values. Note that sliders have different values that they are adjusted by this method. Holding the Shift key will provide adjustments in greater increments when using the arrow keys.

And don’t forget, you can always double-click on the numberic value to enter a specific value.