I just have few questions using the software:
1) How can I merge 2 cells on the top of a table but keep the bottom separated in a 4x4 table? I want to use the top cell as a header
2) You can see in this image the list highlight colour changed in width in the middle thinned and then returned back to its regular size. What is causing this?

3) How can I change the highlight color behind the the numbers in a list because grey is very ugly
thanks