The following review written by one of the Software Informer contributors applies to version 3.1
If you are in the type of work where it is useful to quickly and easily create standard sites or where you have to edit HTML files regularly, then Topstyle 3.5 is for you. Topstyle is a styling utility that allows you to view, edit validate style sheets in Html, Xhtml and CSS file types.
Some of the features that have been built into the program have the ability to upgrade your existing Html documents. It is also useful to compare your CSS syntax against other browser with a side-by-side comparative view. Users can style their sites or stylesheets in the colors and backgrounds that you like. In the case of most PC workers or regular PC users, it makes the working environment pleasant and soft on the eye to be able to choose as oppose to how others would select it for you.
The developers have listed a few of the points that have been affected by the upgrade version 3.5. It contains a utility called Box Spy that reveals Html elements such as margin or tables or boxes that would otherwise make editing near to impossible. Also, files can now be used with external urls. It means that your CSS files can be seen for any other sites you wish to view them from.