Vigor needed to execute skill. Auto Effect is a skill that stays active without consuming vigor.
Marks current skill rank and proficiency. Higher proficiency is needed for higher ranking skills.
Generally level 10 is the highest rank but favorite skills and expert skills can go up to level 15.
Conditions to acquire the skill. Favorite skills and expert skills can be inherited from GMs without fulfilling the conditions. Other skills can only be acquired depending on skill rank and character level. There are NPCs in many villages dedicated to teaching skills.
Current number of skills and max number of skills that can be learned. Higher level means capacity for more skills.
Each profession has a favorite skill. Favorite skills can level up to rank 15 with only half the proficiency needed for general skills.
Expert skills have all the advantages of favorite skills. They add +1 to whatever rank you have gained. Some professions do not have expert skills.