Already two years I play wonderland online. But until today I just know the existing of screen setting~

I am very curious to it so I press the afk mode.
Question:
1. What is the differences between the "normal memory stick(recom.),compressed memory stick and afk mode"?
2. I forgot what was the setting I used before...I want to change back. I am sure I not using the afk mode before this.
Please Help :)

Spoiler:

Repeat to Remember, Remember to Repeat

Just for fun. My favourite game(wlo)+anime(Kuroshitsuji)

im reviving this question cause i want toknow too!