Finally, Microsoft has released the guidelines for Vista toolbar and application icons. Most of what they say could have be inferred from looking at the new icons in the Vista operating system, but the article introduces some concepts and suggestions that I approve of. “Hire an experienced icon designer” is one of them. Here’s what else I like.
The Guidelines are here: Windows Vista Icon Development Guidelines
Let’s start with toolbar icons. (I’ll cover application icons in a separate article.) Microsoft have adopted a policy that I have been pushing for for a long time: “toolbar icons have no perspective to optimize for smaller size and visual distinctiveness”. Is this the end for documents and folders at jaunty angles and fuzzy 3-D printers? Later the article says that toolbar icons above 24×24 can have perspective, “if it makes sense for the object“. The way I interpret this (and the approach I have always tried to take) is a 3-D object on a toolbar only needs perspective if it makes it clearer what the object is, or the perspective is relevant to the function. For example, you can make a perfectly clear representation of a monitor using a 2-D view - there’s nothing gained by viewing it at an angle (you don’t view your monitor at an angle anyway).
Compared to the XP design guidelines there is a welcome emphasis on clarity. It is stressed that that 16×16 size is still one of the most used and important sizes. The defining details of smaller sized icons need to be exaggerated.
More wise words from Microsoft: “Round up all existing details and requirements, such as: the complete set of icons needed, the main function and meaning for each, ‘families’ or clusters in the set you want to be apparent, brand requirements, the exact file names, image formats used in your code, sizes requirements, etc. Ensure up front you can make the most of your time with the designer! … Remember the designer may not be familiar with your product, so provide functional information, screen shots and spec sections can be very helpful.”
They also say: “Think ahead… icon creation can be expensive!” Careful, Microsoft - not that expensive.
In addition to the graphical aspect of toolbar design there are new guidelines on toolbar layout and organization. Lots of useful information here, but it’s somewhat at odds with the new ribbon toolbars of Office 2007 of which it makes no mention.
Something puzzles me: Microsoft have introduced the concept of “optical balance”, and of course, this makes sense - a set of icons should sit comfortably together on a toolbar, and no particular icon should dominate or appear swamped. This, however is their example of a toolbar where “optical balance has not yet been achieved”:

I don’t see anything wrong with this, and I can’t think that Microsoft did either - it’s the toolbar from the released version of Windows Photo Gallery. Perhaps I am missing something - anyone?