Image Capture rotation 'snaps' to vertical/horizontal too agressively

Is there a way to tell Image Capture not to "snap" my rotation to 0 so agressively? If I slightly mis-align something I am scanning and need to rotate it by less than 1 degree to straighten it, I can't do that by dragging the rotation handle, because it will automatically "snap" to 0. Instead I have to laboriously type different values into the text box to get the right rotation.

Also, it would be really helpful if you could drag the rotation handle out so you can use a larger mouse movement to indicate a finer rotation.