Formal:
* Clearly,
* Evidently,
* Obviously,
* It is apparent that,
* It is clear that,
* As is evident,
Informal:
* You can see,
* Check it out,
* Take a look,
* Look at this,
* See for yourself,
* It's pretty obvious,
Descriptive:
* As shown,
* As depicted,
* As illustrated,
The best synonym will depend on the specific situation and the desired tone.