Final answer:
To fix the problem of overlapping letters in his 3D newspaper, Carlos should adjust the leading.
Step-by-step explanation:
To fix the problem of the bottoms of some letters touching the tops of capital letters on the following line in his 3D newspaper, Carlos needs to adjust the leading. Leading refers to the vertical space between lines of text, and increasing the leading will create more space between the lines, preventing the overlap of letters. By adjusting the leading, Carlos will make the text more readable and avoid the issue.