Use of PWM and capture on the same timer

Hi everyone, we work on our first project with the stm32 and the Keil uVision IDE.
We are using TIM4 CH3+4 for PWM generation (simelar to blinky).
Now we want to use TIM4 CH1+2 for capturing 2 signals on Pin6 and Pin7.
Prescaler should be the same.
Question: is this possible?
How can we configurate this with the configuration wizzard?
Have interrupts to be activated? How does the configuration for pin6 and pin7 has to be?
Greetings David & Peter

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