last move how to see in the board

how can i see in the board during the game what was the last move. i can't see it in the setting

Its simple.

1. Click on Settings 
2. In setting look for "online chess" (its below the setting button which you clicked earlier) Don''t worry that "online chess" is not for online games but online chess settings.
3. There you look for "Move Preference"
4. Finally click on the  "Highlight the squares of the last move made" & then click on save setting 

I tried it it doesn't work

So you play live chess & you want last move shown on live chess right.  Go to live chess.  On there, look for settings (You can find it at the top, same line as your name) & click on it.  Finally click on the  "Highlight the squares of the last move made" & the click on save setting.

That should solve your problem. :)