I'm learning TIKZ drawing, but I can't understand what the option x= in this code means, can anyone explain it to me, thank you, code show as below:
\begin{tikzpicture}[even odd rule,rounded corners=2pt,x=10pt,y=10pt]
\filldraw[fill=yellow!80!black] (0,0) rectangle (1,1)
[xshift=5pt,yshift=5pt] (0,0) rectangle (1,1)
[rotate=30] (-1,-1) rectangle (2,2);
\end{tikzpicture}
What does x=10pt mean here?

/tikz/⟨option name⟩in the manual but I'm not too sure about this one) – user202729 Dec 26 '22 at 01:03