Why are some of the letters in Red? I didn't see it in the discussion. I couldn't figure out how to add or attach a picture, but there's two J's, K, Q, and a T that are red
So you must be referring to this chart:
First you need to understand what that chart is for.
This chart teaches you, shall we say, a simple "baseline" for how to act in different situations during pre-flop.
You mentioned the red K so let's look at that line where the K is located.
The first AK couple has a black A and red K, and if you look closer there is also a small o next to them. The explanation key on top left says, o means Offsuit. The offsuitness of A and K are also made clear with the black and red letters in the cards. This doesn't mean that you need to actually hold one red K (heart or diamond) and one black A (spade or club) to continue. Offsuit can just well be A heart K diamond. Offsuit simply means that you are not holding two same suit cards in your hand.
The next AK cards are black they have a small S next to them. This simply means they are cards with same suit.
Next comes those green squares. The top left key explains that this means raising or re-raising .
On top of those square columns there are mentions about positions (early, mid, late) which refer to your current seat at the table. And the line above that describes the situation.
So for example, if the pot is unopened, meaning only blinds are on the table your job is to raise. Next three columns tell you how to act when there are limpers (yes, you raise), and the last three tell you what to do if someone has already raised (you raise, or actually you raise their raise, so you are re-raising by poker terminology).
Now, let's look at one more thing. There is A2 suited on the lower left corner and there is a + sign after the S. What does that mean?
It means that with cards A2 suited up to A7 suited you take the same action as you would with A2 suited. Why not higher than that? Because A8 suited already has it's own line in the chart.
Now you have some kind of understanding how this chart works.
@Marcwantstowin I believe this post belongs in the Learning Poker section.