To make a folder visually easier to recognize, it is handy to change the icon of a folder to explain it's content or purpose. doogiePIM comes with a large built in library consisting of a variety of icon designs. You may choose any of these designs as an icon for a folder.
To change the icon of a folder
Left Click on a Folder's Icon within the Navigator Icon: , or,
Right Click on a Folder's name and choose from the popup menu, "Properties". Then choose the "Display" tab, Then click on the large Button "Choose an icon from library...".
You could also press the keyboard shortcut equivalents:
Ctrl+R to launch the "Properties" window
With the Icon Library window open, navigate to a library you wish, for example "Books", then click on an icon on the right hand side listing.
When you are satisfied with the icon you want, Click on OK to accept the choice, or click on Cancel to cancel the choice.
Introduction to the Icon Library