All Images attached to an Image Field Types now appear as a Thumbnail in the Event Form. You set the width of the thumbnail
A number of users were having trouble with large images taking up a lot of space and disrupting the work flows in the Event Forms. Now, all of the Image fields display the image as a thumbnail. When you click on the Thumbnail the image enlarges to it's original size. The size of the Thumbnail can be set according to the type of files you expect will be uploaded.
Now all Images uploaded to an Image Field Type automatically scale to 100 pixels
Click on the Thumbnail to expand it. Click on it again to reduce it
An example of the second image once it was clicked to view
If you think the thumbnail is to small, you can set the width of the Image (in Pixels). This means the thumbnail width will suit your requirements
The example in the image here shows the thumbnail image being set to have a 500 pixel width (using the Thumbnail Width available from the Advanced Properties for the Image Field Type). The image will scale to fit the 500 pixels which will take up more room on the data entry page (as shown below). It will still expand and collapse when clicked on in the Event Form.