Absolutely! To adjust the contrast/brightness of an image in Surfer:
- Import, copy/paste, or create a base map from your image file (the former two if your image is something unreferenced like a logo, and the latter if the image will be georeferenced, like an aerial image overlay).
- Select the Image in the Contents window (if your image is within a base layer, you may need to click the + next to Base to expand the layer before you see Image).
- On the General tab in the Properties window you can use the sliders or type new values for the Contrast, Brightness, Saturation, and Hue of the image.
Updated October 20, 2017