Auto Leveling Resources in MS Project

[herodot]

Hello!

Let's say I have 2 activities with a fixed duration (4days).

A1 - Day1 to Day 4
A2 - Day1 to Day 4



Worker1 is set to work at both activities at the same time.
Microsoft Project will tell me that we have a problem, because the Worker1 is working 200%.

My question: There is a (automate) way to split the working time of Worker1 so that the over allocation will disappear.

I would like to distribute the working time of my worker evenly to my activities. = He will work 2 days to Activity1 and 2 days to Activity2.

Any hidden feature of M Project to do this without trying to tackle this information manually?