\begin{matrix}
 & \text{Stetching\ in\ base} & \text{Stretching\ in\ script} \\
\text{no\ mrows} & \overset{\text{maps\ to}}{\rightarrow} & \overset{\rightarrow}{\text{maps\ to}} \\
\text{all\ in\ row} & \overset{\text{maps\ to}}{\rightarrow} & \overset{\rightarrow}{\text{maps\ to}} \\
\text{op\ in\ row} & \overset{\text{maps\ to}}{\rightarrow} & \overset{\rightarrow}{\text{maps\ to}} \\
\text{text\ in\ row} & \overset{\text{maps\ to}}{\rightarrow} & \overset{\rightarrow}{\text{maps\ to}} \\
\end{matrix}
