It could be a dummy question, but I'm a little obsessive with the order and organization. I use TeXstudio as editor, so when I call the packages, generally the commands associated to them appears as suggestions when I write. However, TeXstudio mark as wrong some commands even when I called the package. There are 2 examples for the packages siunitx and makecell:
Here, the command \makecell from makecell package appears as wrong and the centimeter option \cm from siunitx too. It's important to say that I have no problems compilating, it's just an obsession.
How can I let TeXstudio to recognize this commands (and others that I can't remember) and show them in the siggestions too?

