HOW TO CHANGE LIGHTING TO STATIC? Help!

So my build time for lighting are incredibly slow and even cause my engine to crash, the problem is that I’m running out of memory, I’ve read that static lighting and level streaming help make the process less stressful on the PC and lower the build times… But how do I turn these on? I Don’t know how to put my mode to static or how to turn on Level streaming Help Please!

Build is creating static lighting… and that usually takes a very long time. It is generating lightmaps and all that. You could technically use level streaming to build all the levels seperate… Never tried it, but im sure it is doable.