Use Case level confusion
I'm working on the use case model of a web design application something like Dreamwaver, I'm little confusing about to which level should I write the use case model. <br>
ex: when the user insert a text should I provide a use cases of:<br> 
1. select font<br>
2. select size<br>
4. color<br>
5. Italic<br>
6. bold<br>
..<br>
..<br>
..<br>
or it's enough just providing a use case called "modify text properties"?
Use Case level confusion
===

I'm working on the use case model of a web design application something like Dreamwaver, I'm little confusing about to which level should I write the use case model. <br>
ex: when the user insert a text should I provide a use cases of:<br> 
1. select font<br>
2. select size<br>
4. color<br>
5. Italic<br>
6. bold<br>
..<br>
..<br>
..<br>
or it's enough just providing a use case called "modify text properties"?