Questions & Answers about Siediti sul divano e riposa.
Why does it say siediti instead of just siedi?
Why is the ti attached to the very end of siediti?
When you give a direct, informal command (the imperative mood), object and reflexive pronouns attach directly to the end of the verb. The command form for "you" is siedi, and adding the pronoun makes it the single word siediti.
If I am talking to "you", why does riposa end in -a instead of -i?
In the normal present tense, "you rest" is indeed riposi. However, when giving a command, Italian verbs that end in -are (like riposare) use an -a ending for the informal "you".