How do I make incremental value changes in microns? I recently got into 3D printing and I am using Blender until that no longer becomes feasible to do so. I am working in real world measurements in Blender, using meters. I have a need to move my background images in the x and y within millionths of a meter increments. Holding down Shift and dragging seems to move the image in centimeters and I can't figure out a way to get a finer adjustment than than except typing in values by hand which is cumbersome. Does anyone know if it is possible to make adjustments within millionths of a meter (microns)?
You may use an Empty (Image) for your background image (Add-->Empty-->Image). In the Empty panel of the Data header you have the same settings as for the Background Images panel of the properties shelf.


In the Scene header set the units to Metric.


Now you can input a precise value to translate the image.