Here lies the delimma.

You create a graphic element using an Auto Shape (Rounded Rectangle, for example) and discover that attempting to apply a Style (Window > Style) just does not work.

This is as designed given the fact that the core nature of an Auto Shape is based on mere javascript. On canvas it is presented as a special group object and we are able to interact with it by using the yellow group node handlers.

Note: Additional properties per Auto Shape Tool are also available in the Window > Auto Shape Properties Panel.

Yet, any attempt to apply, a style from the Styles Panel (Dark Chrome, for example) nothing happens.

You have three options.

Option 1: Ungroup

Ungroup the active Auto Shape using Modify > Ungroup (Right Click/Control > Ungroup) to revert it to a Path object, then apply any Style.

However, in this case you lose the benefits of using an Auto Shape’s node handler properties and from the Window > Auto Shape Properties panel.

See the next two options to avoid ungrouping an Auto Shape, in this regard.

Option 2: Subselect, Superselect

Reap the benefits of both Auto Shape Properties and apply Styles using a few keyboard shortcuts:

  1. With the Auto Shape active
  2. SubSelect the Auto Shape Path object using Ctrl/Command + Left Arrow Key
  3. Then apply your choice of style from the Styles Panel
  4. SuperSelect the original Auto Shape object using Ctrl/Command + Right Arrow Key

Note: Subselect and Superselect are also located under the Select menu.

Option 3: Pointer, Subselection

Reap the benefits of both Auto Shape Properties and apply Styles by toggling between the Pointer Tool and Subselection Tool from the toolbar:

  1. Pointer Tool selects the original Auto Shape
  2. Subselection Tool selects the Auto Shapes path nodes
  3. Then apply your choice of style from the Styles Panel
  4. Then revert back to the Pointer Tool to toggle back to the original Auto Shape

So, maintain integrity of your Auto Shape Properties with applied Styles using either Option 2 or 3.