I have a i7 6 core processor and when I work on AE I get a notice from my Norton program that AE is extensively using one core. I also checked using the resource monitor to see each individual CPU activity and it does show that one CPU is doing all the work. I just want to make sure this is normal or do I need to configure AE to use all cores.
Some things in After Effects are multi-threaded, and some are not.
That would rather be: "Some things in After Effects are multi-threaded, and some most are not."