  1ＧUse this screen to select and modify your character's skills. Find the skill you want to modify, then click the arrows next to its training level.

Clicking the up-arrow increases your training level (from Untrained to Trained, or from Trained to Specialized); clicking the down-arrow decreases your training level. The numbers on the arrows represent the number of skill credits you spend when you upgrade, or gain when you downgrade, the skill.

In the game, you can spend experience points to raise your Trained and Specialized skills into the hundreds. You can also earn more skill credits to train new skills.