When you turn on Enable WebGL to use effects, the effects are also applied to the layout editor on Construct.
If you have distortion effects, the simple action of clicking on anything becomes a very difficult task.
If you have the brightness effect set at 0 (I do, in order to have a fade in), your layout will be only a black rectangle.
Basically, some effects make the layout editor unusable. Because of this, you have to turn the Enable WebGL feature off to edit layout and turn it on to test and export. This is very inconvenient, sometimes yo export your project only to discover that WebGL was off, so you have to turn it back on and then export again.
It would be very useful to have an option to turn effects off from the editor.
Note: If such option already exists, please let me know where is it, I've been looking for it.