How to make Intellij Idea Java suggest alternative method scope?

Hi there, 

First time posting, please let me know if something could be done better! 

Yesterday a friend of mine looked over a random piece of code of mine and told me that I had orange warnings all over the place on my methods' scopes (for instance, I could've made something package-privated or the default one, while instead I used protected) - whereas on mine it doesn't say anything. I wondered whether the problem was caused by IntelliJ versions, but it turns out both of ours are the most recent one. So I went to Analyze - configure current file analysis - configure inspection, and saw all these options and lost my way there.

Can someone help me out by pointing me in the right direction? Thanks a lot!