how do I correct a typo error while entering a text message.

[AC Question]

I'm using a galaxy S6 phone where I can delete the last typed entry, but cannot go back in the previous text to correct an error without deleting all the text following the erro

 

[TJA3500]

Touch the spot in the line of text where you want the cursor. If you don't get it in exactly the right spot, press and on the cursor and move it where you want it.
If you have the latest Google keyboard, you can slide left or right on the space bar to move the cursor.