How to use a name different from "Figure" in the caption?

Question

I'm writing a document with many tables and figures.

This is a reproducible piece of my document. (With LuaTeX, but plain LaTeX is OK too).

\RequirePackage{luatex85}
\documentclass[11pt,a4paper]{article}
\usepackage[capitalise,noabbrev]{cleveref}
\usepackage[demo]{graphicx} 
\usepackage{float}
\usepackage[section]{placeins}
%\counterwithin{figure}{subsection}
\usepackage[skip=5pt]{caption}  %, margin=2em   ,labelfont=it,  , textfont=it
\captionsetup{font=small, labelfont=bf} %,format=hang
\addtolength{\footnotesep}{5mm}

\begin{document}

\section{Introduction}
\cref{fig:esquema1} summarizes the process

\begin{figure}[h]
    \centering
    \includegraphics[width=0.95\linewidth]{esquema1}
    \caption{My caption.}
    \label{fig:esquema1}
\end{figure}

\end{document}

I'd like that some captions instead of "Figure 1" were automatically called "Diagram 1", both below the figure and when referenced from the document.

How can tell LaTeX to do it?

I've read something like

%\captionsetup[figure]{name={Fig.}}   

will change the name, but it will do it for all Figures.

I would like to keep that name for figures (real pictures) but add a new "Diagram" name for other (diagrams made with tikz and other).

Answer 1

Here is a version suitable for some few occurences of such diagram caption:

1. Define a counter named diagram (for example) that shares the same value as figure, with \newaliascnt from aliascnt package.
2. Say \captionsetup{name={Diag.}} within the figure environment that should have Diag. as caption lead-in.
3. Define \crefname and \Crefname for diagram counter.
4. Say \label[diagram]{...} in order to make cleveref aware that the diagram counter should be referenced and not figure.

---

\RequirePackage{luatex85}
\documentclass[11pt,a4paper]{article}
\usepackage{float}
\usepackage[section]{placeins}
\usepackage{aliascnt}
\newaliascnt{diagram}{figure}

%\counterwithin{figure}{subsection}
\usepackage[skip=5pt]{caption}  %, margin=2em   ,labelfont=it,  , textfont=it
\captionsetup{font=small, labelfont=bf} %,format=hang
\addtolength{\footnotesep}{5mm}

\usepackage[demo]{graphicx}
\usepackage{cleveref}

\crefname{diagram}{diagram}{diagrams}
\Crefname{diagram}{Diagram}{Diagrams}

\begin{document}

\section{Introduction}
\cref{fig:esquema1} summarizes the process

\begin{figure}[h]
    \captionsetup{name={Diag.}} 
    \centering
    \includegraphics[width=0.95\linewidth]{esquema1}
    \caption{My caption.}
    \label[diagram]{fig:esquema1}
\end{figure}

\end{document}