Corner Styles in InDesign
In Indesign, in the top menu bar, you can change the corner style from the traditional squared corners, to round, inset, etc. The problem is, if you want one or all of the corners to be different, there isn’t a way to do it from here.
If you go to Object > Corner Options, a dialog box comes up where you can edit the corner styles. By default, it is set to change all 4 corners at once, and to the same style. Simply uncheck the chain link in the center, and now you can change each corner shape individually. For example, you could have 3 squared corners and one round, or if you wanted a tab-style box, you could make 2 corners round and the other two square. The other neat thing about this menu is that you can change the size of the corner style individually as well, giving you more shape flexibility.
If you click on the drop down menu whose picture looks like a corner, you have a myriad of options for different corner styles. The default is rounded, but you can have none, fancy, bevel, inset, and inverse rounded. You can also apply different styles to different corners, so the options are pretty flexible. This breaks the mold of the traditional box and gives you a few more creative options, so you won’t have to settle for only boxes or rectangular shapes. Below is a green text box with different corner options applied to it:
Rounded
Inverse Rounded
Inset 
Bevel 
Fancy 
Conclusion
Breaking the mold in InDesign isn’t difficult if you know where to look. You have a lot of flexibility with what you can do in InDesign, because it is part of the Creative Suite, and it works well with Illustrator and Photoshop. Text boxes don’t have to be traditional in shape, and InDesign gives you a lot of control over the size of your objects and how everything looks. Being able to determine the roundness and the shape of your text boxes makes your work look more professional and less generic.
