Another way, simpler but maybe less flexible is to add this to the YAML:
title: |
  ![ ](WGLogo.png){width=1in}  
  Your title here


On Thursday, 24 December 2020 at 21:35:19 UTC+2 the.so...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org wrote:
I'm not a LaTeX expert, but I recently used this excerpted bit in a metadata file, and it worked for me.  Your mileage may vary.

```
header-includes: |
  \usepackage{graphicx}
  \usepackage{titling}
  \pretitle{\begin{center}
    \includegraphics[height=1.25in]{source/full-logo.png}\Huge\vskip 5em}
  \posttitle{\vfill \color{NavyBlue} \LARGE Long Title of Project
             \par \large PROJECT \par \normalsize Project Agreement No: XXXX \par \end{center}}
```


On Friday, 25 December, 2020 at 12:05:33 am UTC+5:30 gnpan wrote:
Hmm, I don't use Makefile so can't be sure what goes wrong - I put all the fontsize, mainfont, geometry, papersize, etc. in the YAML. Try something simple first:
Create a test.md file with the following content (or use the attachment):
---
date: 24 December 2020
header-includes: 
  - \usepackage{wallpaper}
  - \addtolength{\wpYoffset}{12cm} 
  - \ThisCenterWallPaper{1}{WGLogo.png}
---

# Your title

Your text. 

Then run this command:
pandoc --pdf-engine xelatex -o test.pdf test.md

That should work and you can take it on from there. 
On Thursday, 24 December 2020 at 19:54:28 UTC+2 LRP wrote:
Oops. I forgot to delete two lines in my YAML  file.

error message now reads:

Error producing PDF.
! LaTeX Error: Can be used only in preamble.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
...                                             
                                                 
l.65 \usepackage

Here's YAML file:

---
...
date: December 23, 2020
header-includes:
   - \usepackage{wallpaper}
   - \ThisCenterWallPaper{1}{WGLogo.png}
--

Here's -how I call pandoc in Makefile:
       pandoc \
                --top-level-division=chapter  \
                --variable mainfont="DejaVu Sans" \
                --variable monofont="DejaVu Sans Mono" \
                --variable fontsize=11pt \
                --variable geometry:"top=1in, bottom=2in, left=1in, right=1in" \
                --variable geometry:a4paper \
                --table-of-contents \
                --number-sections \
                -f markdown  $< \
                --pdf-engine=pdflatex \
                -o $@

Thanks again,

LRP





On Thu, Dec 24, 2020, at 12:33 PM, Lloyd R. prentice wrote:
Thanks. But I get this feedback:

[WARNING] Could not fetch resource 'WritersglenLogo_Color.png': replacing image with description
[WARNING] Could not fetch resource 'WritersglenLogo_Color.png': replacing image with description
Error producing PDF.
! Package pdftex.def Error: File `WritersglenLogo\T1\textunderscoreColor.png' n
ot found: using draft setting.

See the pdftex.def package documentation for explanation.
Type  H <return>  for immediate help.

Here's m YAML declaration:
---
...
date: December 23, 2020
header-includes:
   - \usepackage{wallpaper}
   - \ThisCenterWallPaper{1}{WGLogo.png}
---

And here's my source directory:

-rw-r--r-- 1 lloyd lloyd 25516 Aug  1 00:31 WGLogo.png
-rw-r--r-- 1 lloyd lloyd   871 Dec 24 12:23 Writersglen.md

LRP

On Thu, Dec 24, 2020, at 9:43 AM, gnpan wrote:
Put the following in your YAML block:
header-includes: 
  - \usepackage{wallpaper}
  - \addtolength{\wpYoffset}{12cm} 
  - \ThisCenterWallPaper{1}{logo.png}

Change logo.png to whatever you logo is called (make sure it's in the same folder as your txt file) and adjust the Y offset to a value that gets the logo in the required position. You can also change the scale factor {1}. 
On Wednesday, 23 December 2020 at 23:38:58 UTC+2 LRP wrote:
I'd like to center a logo before the title on my PDF title page.

I found a recipe on the web using \usepackage{titling} in the metadata, but it failed. Can some kind soul show me how?

Many thanks,

LRP


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