How to change Custom control (External) height?

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Hi, Everyone!
On the WEBCON form (ver. 2025), I would like to display a simple external website for the user. There is no need to save this information in the document. I used Custom control (External) for this purpose. After entering the URL in the attribute properties, the page displays, but I have no idea how to change the size of the control. It is best to change it dynamically depending on the content of the displayed external page. Can anyone help? Is this possible without writing a plugin? Unfortunately, I did not find any information about this in the published documentation.
Thanks in advance for help!

Hi Jacek,

you could also use an HTML field and reference the web page in an iFrame. You can easily define the width and height here:


iframe width="475" height="250" src="https://webuhr.de/embed/stoppuhr/#enabled=I&theme=0" allowfullscreen /iframe

I had to remove the <>. Otherwise the text isn't displayed.

Here's an image of it:
https://community.webcon.com/uploads/messages/6595/2025_01_20_20h15_28_reUNES.png

Best regards,
Daniel