When you sample (softness, tolerance, and so on) using the colour picker or the numeric fields, you have the option of having the image update interactively as you move the cursor, or having the image update only when you release the cursor.
It is useful to update the image only after sampling if interaction during sampling is slow. This can happen if you are working with high resolution images, or if you are sampling while viewing a context from further along the pipeline. This can also occur in CurResult view, where a large amount of processing is required to display the result.
To update the image interactively:
To update the image after completing the sample:
