Help Is there a way to add more apps into the multi window?

[spman]

One some apps are available in the multi window sidebar (I already pressed the edit button, the app is not inside there). Is there a way to add more apps that are not shown inside multi window sidebar and edit button?

I am using Samsung S4

 

[dynomot]

Yes, but only by rooting and using something like Wanam exposed. You have come across one of my main reasons to root.

 

[Mr. Lucky]

Only if your phone is rooted. It requires Xposed framework and the XMultiWindow module.