The latest web sites that I’ve created have been adapted to WAI. Among the all reqirements there is one that text should be scalable. Since EPI version 4.3 this works fine.
However, when designing interfaces we also use images. These are not scaleable when you insert them from the editor. This due to the fact that images size is set in pixels with Width and Hight tags. It would work better if the editor were able to set the size in % (width=100%) or in EM (width=2.4em). A proper dialog for these size properties would be nice to have in the editor.
EPiServer 4.40 has a image properties dialog on the right click menu where you can set with/height in both pixels and percentage. You can also set css-classes for images.