I was wondering if it's possible to make comic book style chat bubbles in Adobe In Design, and if so could you tell me how it's done?
Uh, yes? Draw an oval shape, then attach a pointer? Or draw one entirely from sracth using the Pen tool? That's what those drawing tools are for? So, yeah sure, it's "possible", and it's done using the drawing tools (unless you need instructions on How Do I Use Those Drawing Tools, Then -- in that case I gladly refer you to the Online Help).
As a matter of fact, speech bubbles were just the other month a question in the Scripting section:
Drawing a triangle shape thru a script, reading a selection bounds and mouse pointer? (and if you need instructions on How Do I Use Those Scripts, Then, I gladly refer you to the Online Help).