In earlier mendix versions debugging was possible during runtime. I've noticed that we're able to place breakpoints. But this means you have to redeploy your app. Is there any way to debug without redeploying?
There are plans to be able to set breakpoints at runtime, but at this moment it's not possible.
Sebastiaan van den Broek
You could use the breakpoint conditions. That way you can place multiple breakpoints and still be able to test your application without getting the debugger window all the time.