1. A method for adjusting color values of an image represented in a color space, the image comprising a set of pixels, each pixel comprising a set of color values, the method comprising: displaying a composite bump on a tonal adjustment graph that is defined along a particular color component of the color space, the composite bump generated by blending a plurality of bumps on the tonal adjustment graph; when a cursor is placed within the tonal adjustment graph, identifying a position of the cursor within the composite bump; based on the position of the cursor, identifying a particular bump of the plurality of bumps; and providing a visual indication to indicate that the particular bump is selectable and modifiable.