Learn Dutch: Ik zet de baby in de stoel, zodat ze aan de tafel zit. - I put the baby in the chair, so she sits at the table.

This is the core difference between transitive and intransitive posture verbs. Zetten means to put or place something in an upright position. It is transitive, meaning it requires a direct object (you are putting de baby somewhere). Zitten describes the state of being in a seated position. It is intransitive, meaning there is no direct object; the baby is simply performing the action herself.

Why does the verb zit go to the very end of the sentence?

The word zodat (so that) is a subordinating conjunction. In Dutch, subordinating conjunctions kick the conjugated verb to the very end of their clause. So instead of the normal word order ze zit aan de tafel, it becomes zodat ze aan de tafel zit.

Why is it aan de tafel instead of bij de tafel?

When we talk about sitting 'at' a table to eat, work, or do an activity, Dutch always uses the preposition aan. Using bij de tafel would just mean sitting somewhere in the general vicinity of the table, not actively pulled up to the edge of it.

Could I use zij instead of ze in this sentence?