Characteristics and Examples of Spatial Data - Introducing Geographic Information Systems with ArcGIS - page 120

changing the color of a plotting symbol is something you might want to record as a Fast Fact.
Find a tiny text box next to the plotting symbol and click it (or click just to the right of it). Type
“GPS point” (just to identify it for yourself in the future) and press Enter.
5. Set the map units and display units: If you move the cursor around the map, you will see
numbers appear in the Status bar at the bottom of the screen. These are display units and
are presently shown as Feet. Right-click the data frame to bring up a menu. Click Data Frame
Properties to see the Data Frame Properties window. Click the General tab. In the Units area,
you will see Feet in the Map text box. The box is grayed out, so you can't change it. The reason
is that the data set has its projection defined already (Kentucky North Zone [1601]), which has
survey feet as its unit of measurement.
6. Notice that you can change the display units in Data Frame Properties. They are set as feet,
by default—the same as the map units. Place the cursor in the Display text box, click, and
press Shift-F1. If things are set up properly, the software cooperates, and you are lucky, context-
sensitive help will appear; read the information, then click elsewhere in the window to dismiss
it. From the Display drop-down menu select Miles for the Display text box. See Figure 2-12.
Click Apply. Click OK. You may note, as you slide the cursor around the map, that now the
status bar shows the display units to be Miles. These are the number of miles, in the X and Y
directions, respectively, from the origin of the coordinate system.
7. Understanding the difference between map units and display units: It used to be the case
that you could get a GIS glossary by clicking the data frame, pressing F1 > Contents tab > GIS
Glossary. Unfortunately, this seems to have disappeared from later versions of the software.
You might try the procedure to see if the glossary has been restored. You will get the ARC GIS
FIGURE 2-12