Have you ever wanted to be able to manually set max framerate for testing purposes. To my knowledge, there is no way to do this in construct 2, However, I have a hack that works quite well.
Go to your graphics properties (it may be in the system tray, or you may have to access it in the control panel)
Change the refresh rate of your monitor (ex 40hz or 60 hz).
Construct 2 fps will not exceed the refresh rate of the monitor. Note that not all monitors are equal and some will look awful with particular refresh rates. Also, you may not have the option, but if you need a way to test multiple frame rates this method is nice!