CE default image height/width

Its been a while since i built a site in Contao.

Well on a new site i had to set the default image content element width height, and i was looking up how to do that in dcaconfig.php
Turns out this documentation still is hard to find. Does it even exist?
From what i found there is a default config in each module .. its not

Code:

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/domains/reisburovanraak.nl/public_html/system/modules/core/dca/tl_content.php

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is it?

Thats question 1.


Which led me to question 2:

Anyway, in the backend of Contao 3.5.24 i found this option on the Theme page "image sizes"..:
Attachment 168
So i wondered "hey maybe they have a feature for that now" and descided to look into this.
But again, no documentation. At least not on https://docs.contao.org/en/ and Google gave no results either.
The page to add one looks like this:

Attachment 167

And also there, no help function or text. What does it do?
Thats question 2.

Yes, of course ...dca/tl_content.php is the default configuration.

You can modify this within your system/config/dcaconfig.php

PHP Code:

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// Default image size - width, height, mode|size-ID
// Mode options: proportional, box, crop, left_top, center_top, right_top, left_center, center_center, right_center, left_bottom, center_bottom, right_bottom
$GLOBALS['TL_DCA']['tl_content']['fields']['size']['default']  = array(600, 400, 'proportional');
// Or a default image size ID
$GLOBALS['TL_DCA']['tl_content']['fields']['size']['default']  = array('', '', 42); 


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For the image sizes there only exist geman tutorials.

First you have to learn something about the HTML picture element.
https://www.w3schools.com/tags/tag_picture.asp
https://developer.mozilla.org/en-US/...lement/picture
http://w3c.github.io/html/semantics-...icture-element

Here is a nice Contao tutorial with video
https://contao.org/files/conference/...t-4-folien.pdf
https://www.youtube.com/watch?v=ub8yROSQyQ4

And here another Contao tutorial
https://rocksolidthemes.com/de/conta...picture-contao

Notice that you do not have to check the polyfill in the layout to make it work. That's a mistakable hint from Contao.