Let's look at the attribute table and add a colemn for the historic building name.

Right click on the "CampusBuilding" file and go to "Open Attribute Table"

Click on the "New Field" button in the toolbar in the attribute table.

Change the Type to Text since we want to record building names. \
Then change the Length to 50 (this is how many characters the field can hold).\
Click "OK"

Change the Type to Text, since we want to track the names

Click on the first row under "OldName" and type "Amelia Gayle Gorgas Library" and hit enter. \
Then add the name of the other building you traced to the next row. Close the attribute table by clicking the "X" in the top right corner

Click on the cell row under "OldName" and type Amelia Gayle Gorgas Library and hit enter

Then add the name of your building to the next row and close the attribute table by clicking the "x" in the top right corner

QGIS Digitizing Tutorial 5: Editing and Adding Attribute Information