Thank you very much for your feedback and your time!
I can send you here everything in case this can be of interest to someone else.
Yes, now I understood about the shortcodes, good to know, thanks.
So far, I managed to do this already:
https://pasteboard.co/wjbFmecAbGBg.jpg
But the background is the default one and I cannot modify it and the text block is still fully inside the image, not halfway only.
The HTML box contains this:
`[wpupg-item-image default=”500×999″]
<div class=”wpupg-template-overlay-new-container”>
[wpupg-item-title link=”0″]
[wpupg-item-excerpt limit_text=”1″ label=”Label text” label_on_own_line=”1″ label_separator=” ———” limit_type=”words”]
</div>`
and the CSS this:
`.wpupg-template-overlay-new {
width: 100%;
max-width: %wpupg_max_width%;
background-color: %wpupg_background%;
font-size: %wpupg_main_font_size%;
line-height: %wpupg_main_line_height%;
color: %wpupg_main_text%;
margin: 5px;
}.wpupg-template-overlay-new {
border-style: %wpupg_border_style%;
border-width: %wpupg_border_width%;
border-color: %wpupg_border%;
border-radius: %wpupg_border_radius%;
padding: 0;
}
.wpupg-template-overlay-new .wpupg-template-overlay-new-container {
padding: %wpupg_overlay_padding%;
}
.wpupg-template-overlay-new.wpupg-item-has-image .wpupg-template-overlay-new-container {
position: absolute;
left: 20px;
right: 20px;
bottom: 40px;
background-color: %wpupg_overlay_color%;
color: %wpupg_overlay_text_color%;
}`
If I remember well I only modified the margins in there and the background color was not accepting any change in the CSS box.
Best.