Success! Looks like we've fixed this one. According to our records the fix was applied for
a recent build.
Drag n' Drop Image overtakes the Designer
Attempted to drag and drop an image file (.png) format to the layout interface of the Designer.
The image consumed the entire view of the Designer, placement was to the upper-left corner of the Designer maintaining the original image size and whitespace filling the remainder of the container real estate.
The Designer is rendered unusable at this point, there is no way that I found to undo or get back to the Designer once in this state. Have to close the application and reopen.
Designer doesnt support images from external source. Its only supports whats available in the toolbox.
We will fix the usability issue. Thanks for the report.
Sencha Designer Development Team
This will be fixed in build > 341.