Write in to as two words when you refer to connecting to a program or application. In this case, in and to come one after the other, but are not directly related.
Use into as one word to mean being inside or moving inward. If you use turn into in place of become, write into as one word.
Preferred |
Discouraged |
Log in to the system as craft. |
Log into the system as craft. |
Slide the power supply unit into the chassis. |
Slide the power supply unit in to the chassis. |
When you answer a page call, it turns into a normal call. |
When you answer a page call, it turns in to a normal call. |
