More Formal:
* As is evident
* As can be observed
* As it is readily apparent
* As is clearly demonstrated
* As is plainly visible
More Informal:
* You can see
* You'll notice
* It's clear that
* It's obvious
* As you've noticed
More Concise:
* Clearly,
* Evidently,
* Obviously,
* Plainly,
* Visibly,
The best phrase to use will depend on the context and your desired tone.
For example, if you're writing a formal report, "as is evident" might be the best choice. If you're writing a blog post, "you'll notice" might be more appropriate.