Eight note triplets.

https://preview.redd.it/sxxkk89fxjfe1.png?width=386&format=png&auto=webp&s=963513858e921a7843a04af026facd81b7043032

Yo guys. I want to make these 3 notes 8. note triplets, but when i do it keeps on making 16. notes triplets like this

https://preview.redd.it/sah66rqkxjfe1.png?width=526&format=png&auto=webp&s=8e93b8f7d4d0b7ad086cfcc628bb55eaa86d43ca

Anyone that can help me with this?

https://preview.redd.it/kwy6h87oxjfe1.png?width=114&format=png&auto=webp&s=67d217ba8d8a4a9f7f58178b26b48052b92c25b1

It should look like this