Folks, I hate to get on a soap box, but...
The key function of an engineering drawing is to depict the end-item and its constituent parts (ref: ASME Y14.100). This is used to portray end-item requirements for inspection and manufacturing. By telling the manufacturer exactly how to do something on the drawing only ties his hands, stifles his creativity, and drives up your costs (besides, it's less work if you keep the stuff OFF the drawing).
When you pollute the drawing with how to information, you create an unwieldy, error-prone, yet formal document that will undergo formal revision until the cows come home. Play it smart. Keep the how tos in Work Instructions that are typically under INFORMAL document control (ECNs not required). Note that Pro/E can do a great job with Work Instructions!
Now, for the balloons. In a complex assembly, if you have 23 different places where use use a bolt, are you going to call it out 23 separate times, stating the bolt's size, length, style, material, thread, ad naseum? That is simply too much work and it serves to make the drawing ugly and cluttered.
Nuff said!
Tunalover
Balloons were created for drawings so that you'll have a concise way of calling out items that may appear dozens of times in the same drawing. I don't know about you, but I prefer to provide the description of a part ONCE in a bill of material (or parts list, or whatever you want to call it).