再 faces forward: one more step you haven't taken

Where the picture shows up in 再

1. 1

   one more, up ahead

   请再说一遍。

   qǐng zài shuō yí biàn

   Could you say that again?

2. 2

   again, next time

   我明天再来。

   wǒ míng tiān zài lái

   I'll come back tomorrow.

3. 3

   and only then

   吃完饭再走吧。

   chī wán fàn zài zǒu ba

   Finish your meal first, then go.

   A 完 再 B means 'do B only after finishing A'. This 再 orders the steps in time.

4. 4

   push one notch further

   再便宜一点吧。

   zài pián yi yì diǎn ba

   Come on, knock a bit more off the price.