In the created HTML code from 2.91b and earlier you get: img { border-width: 0;}

In 2.91c you also get a vertical align value:
img {
border-width: 0;
vertical-align: top;
}
How can I change the vertical align to e.g. left?

I get offset problems with my menu dropdown indicator arrows if the parameter is "top"

If you need to change it for all images on the page, use a code object and set the code placement to "in CSS" and enter:

img {
  vertical-align: left;
}

This will be placed in the published code after the SSPro generated code and will override the normal setting.

Alternately, you can do this on an image-by-images basis. Activate the desired image and open the Geometry Editor to the Options tab. At the bottom is a Code field where you can enter:

style='vertical-align: left'  

Thanks Larry,

Your suggestion adding a code object and the code placement "in CSS" fixed the problem with vertical-align: middle;