The next step is to create a new layer for adding the dimension lines.
As with previous steps where new layers were added, the same process must be followed to create a layer for the dimensions.
First, open the sidebar.
Second, lock the Kitchen layer since no additional changes will be made.
Fourth, as before, double click on the newly created layer (Layer 9) and rename it to Dimensions.
Lastly, make certain the Dimensions layer is selected and then dismiss the Layers Panel by clicking outside of it.
The Layers Panel will appear as shown below after these steps have been completed.