As described in answers to this [question](https://tex.stackexchange.com/questions/35240/special-arrangement-of-subfigures/35243?noredirect=1#comment363076_35243), the following code:

```
\documentclass{memoir}
\newsubfloat{figure}
\begin{document}
\begin{figure}[H]
\centering%
\begin{tabular}{lr}
\begin{tabular}{c}%
\subbottom[A]{\rule{0.3\linewidth}{100pt}} \\
\subbottom[B]{\rule{0.3\linewidth}{100pt}}
\end{tabular}
&
\subbottom[C]{\rule{0.6\linewidth}{230pt}}
\end{tabular}
\caption{D}%
\end{figure}
\end{document}

```

Leads to significant misalignment. How do I fix it?

![enter image description here](https://i.stack.imgur.com/u2YGJ.png)
['https://tex.stackexchange.com/questions/159052', 'https://tex.stackexchange.com', 'https://tex.stackexchange.com/users/512/']
Use `b` for the optional argument in the inner tabular:

```
\documentclass{memoir}
\newsubfloat{figure}
\begin{document}
\begin{figure}[H]
\centering%
\begin{tabular}{@{}lr@{}}
\begin{tabular}[b]{c}%
\subbottom[A]{\rule{0.3\linewidth}{100pt}} \\
\subbottom[B]{\rule{0.3\linewidth}{100pt}}
\end{tabular}
&
\subbottom[C]{\rule{0.6\linewidth}{230pt}}
\end{tabular}
\caption{D}%
\end{figure}
\end{document}

```

![enter image description here](https://i.stack.imgur.com/VtbIf.png)

I'd however, suggest `minipage`s of fixed height inside the `tabular` (again, with `b`ottom alignment):

```
\documentclass{memoir}
\newsubfloat{figure}
\begin{document}
\begin{figure}[H]
\centering%
\begin{tabular}{@{}lr@{}}
\begin{minipage}[c][230pt][b]{0.3\linewidth}%
\subbottom[A]{\rule{\linewidth}{100pt}}\\[9.5pt]
\subbottom[B]{\rule{\linewidth}{100pt}}
\end{minipage}
&
\begin{minipage}[c][230pt][b]{0.6\linewidth}%
\subbottom[C]{\rule{\linewidth}{230pt}}
\end{minipage}
\end{tabular}
\caption{D}%
\end{figure}
\end{document}

```

![enter image description here](https://i.stack.imgur.com/HpAZw.png)
Just for fun. For some reason, the first subbottom has a 5pt smaller top margin than all subsequent subbottoms.

```
\documentclass{memoir}
\usepackage{tikz}

\newsubfloat{figure}
\begin{document}
\begin{figure}[H]
\centering%
\begin{tikzpicture}
\path
(0,0) node(C){\subbottom[C]{\rule{0.6\linewidth}{230pt}}}
(C.north west) +(0,5pt) node[below left]
{\subbottom[A]{\rule{0.3\linewidth}{100pt}}}
(C.south west) node[above left]
{\subbottom[B]{\rule{0.3\linewidth}{100pt}}};
\end{tikzpicture}
\caption{D}%
\end{figure}
\end{document}

```

![figure](https://i.stack.imgur.com/5COTl.png)