The Manage Category Assignments feature allows you to pick a Category/Subcategory and Page Type and assign these Categories/Subcategories to specific Shapes as well as giving you visual feedback as to what Shapes are assigned to which Category/Subcategory. This is a good interface to assign or re-assign multiple Categories/Subcategories to a single Shape. This is the opposite of the Manage Shape Assignments feature.
In the D-Tools SI window within Visio, click the Manage Shapes button and select Manage Assignments->Categories:
This will open the Manage Category Assignments form:
In this example, I want to assign the "Media Server" shape to five different Categories/Subcategories for Elevation pages. Select the Categories/Subcategories in the Categories interface and use the right-arrow button in the middle of the form to move them over to the Assigned Shapes section. The form now looks like this:
Click the Assign->All:
This will open up the Assign Shape for Categories form. Here I selected the "Media Server" Shape from the "Elevation Shapes" Stencil:
Click the [Assign] button on the form and you will be brought back to the Manage Category Assignments form where you will see a visual representation of the Shape that is assigned to these five Categories\Subcategories:
Click [Save and Close] or [Save] if you want to continue managing your assignments:
If you want a "clean slate" to work from, you can choose to unassign all existing Category assignments. Be warned, this action can not be undone for any user assignments. However, you can always reset to the default pre-assignments from D-Tools.
In the D-Tools SI window within Visio, click the Manage Shapes button and select Manage Assignments->Unassign Categories:
This will open the Delete Category and Shape Assignments form.
Check Page Type for which you want to delete the assigments and click [Yes]. This will display the following warning:
If you ever want to restore the default pre-assignments from D-Tools, in the D-Tools SI window within Visio, click the Manage Shapes button and select Manage Assignments->Categories. On this form click the [Restore Defaults] button: