Once you've launched or injected into a program, you can stop and start data collection whilst the program is running.
This is a high level switch that controls all data collection, regardless of any other settings.
With data collection off, the target program runs at close to normal speed.
Temporarily turning off collection can be a good idea if you need to take actions to get the program into the right state for validation.
You can also turn data off from the start and only turn it on when you need it.
 File menu 
 Start collecting data... 
 starts collecting data immediately 
or click on the green arrow icon on the session toolbar to start collecting.
 
 File menu 
 Stop collecting data... 
 stops collecting 
or click on the orange pause icon on the session toolbar to stop collecting.
 