# Subcaption defaulting to capital letter labels?

I seem to be having a unique problem. There are many questions asking about how to change subcaption to a label with capital letters but for me my program is defaulting to capital letters when I would prefer lowercase.

My preamble

\documentclass[12pt,reqno]{amsart}
\setlength\parindent{0pt} %no auto indentation for new paragraphs
\usepackage{geometry}
\geometry{a4paper}
\usepackage{natbib}

\usepackage[latin1]{inputenc}
\usepackage{amsmath, amsthm, amssymb, calc, dsfont}
\usepackage{enumerate}
\usepackage{subcaption, caption, graphicx} %figure packages
\usepackage{authblk} %author affiliations
\usepackage{setspace, lineno} %double spaced etc. options, line numbering

\usepackage{tikz}
\usetikzlibrary{shapes,arrows,chains,automata,positioning}


My figure

\begin{figure}[h!]
\centering
\begin{subfigure}[]{0.48\textwidth}
\includegraphics{Figure1.pdf}
\caption{}
\label{FigPractice}
\end{subfigure}

\begin{subfigure}[]{0.48\textwidth}
\includegraphics{Figure2.pdf}
\caption{}
\label{PracticeAge}
\end{subfigure}
\caption{a caption}
\end{figure}


I've also tried \renewcommand{\thesubfigure}{\alph{subfigure}}

The amsart default uses small caps for the labels. What you see aren't actually uppercase letters, but lowercase small caps. The picture displays it nicely, i changed the the appearance of the second subfigure to be uppercase (Alph). The word figure reveals it quite nice as well.

You can use captionsetup to set the font of the label. You can restrict it to subfigures, using the optional argument.

\documentclass{amsart}
\usepackage{subcaption}
\captionsetup[subfigure]{labelfont=rm}
%\captionsetup{labelfont=rm}
\begin{document}\begin{figure}[h!]
\centering
\begin{subfigure}[]{0.48\textwidth}
\caption{A}
\label{FigPractice}
\end{subfigure}\par
\renewcommand{\thesubfigure}{\Alph{subfigure}}
\begin{subfigure}[]{0.48\textwidth}
\caption{B}
\label{PracticeAge}
\end{subfigure}
\caption{a caption}
\end{figure}
\end{document}

• The AMS-classes define documents in the style of the AMS. I wouldn't call that messing around. If you sell designer lamps, and use a hammer for reshaping, would you say the designer lamp is messing with the way a lamp is supposed to look like? – Johannes_B Mar 16 '15 at 22:50
• adding \captionsetup[subfigure]{margin=0pt, parskip=0pt, hangindent=0pt, indention=0pt, labelformat=parens, labelfont=rm} (the default settings for subcaption) worked for me. – WetlabStudent Mar 16 '15 at 22:57