Sorry, but I meant the built in "Help' files which are also available in pdf format as a downloadable "User Guide".
here is a copy/paste from topo8 on the "Route Avoid" creation. It should get you going. Good luck. JM_2Avoiding a Specified Area When Routing
If you know you will be travelling in an area that is under construction or is a highly-populated area with a lot of traffic congestion, you can draw a circle/rectangle/polygon over that area to avoid it when you calculate your route. You can create multiple regions to avoid.To Avoid a Specified Area When Routing
Use the following steps to designate an area to avoid when calculating your route.
Create a route.
Click the Draw tab to open the Draw dialog area.
Click and hold the Polygon/Rectangle/Circle tool to view its hidden options. Select the tool you want to use.
Optional. Select one or more of the following:
From the Fill drop-down list, select the fill style you want to apply to the draw object.
Click the fill color button to the right of the Fill drop-down list to select the color for your fill style.
Select an outline style for your draw object from the Outline drop-down list.
Click the outline color button to select a color for the outline of your draw object.
Select the width for your draw object outline from the Width drop-down list.
Select the Show Measurement check box to display measurement information for your draw object as your draw it on the map.
If you selected the Circle tool, click the location for the circle's center on the map and drag away from center to set the radius for the circle. Release as soon as you achieve the radius you want.
The radius of the circle and the coordinates of the circle's center display in the corresponding text boxes to the right of the circle fill option area.
If you selected the Polygon tool, click the map to enter each point of the polygon.
If you selected the Rectangle tool, click the location for the rectangle's upper-left corner on the map and drag away from the corner to set the width, height, and area for the rectangle. Release as soon as you achieve the size you want.
Click the Select tool and then click the draw object on the map.
A box displays around the object indicating that it is active.
Right-click the draw object, point to Manage Draw, and click Route Avoid. If the object has no name, it the name "Route Avoid" is visible on the map.
If you do not have the Auto Calculate option selected in the Route tab, click the Route tab and then click Calculate to recalculate your route.
Note To undo your route avoid, click the Select tool in the Draw tab and click the draw object on the map. Then, press the DELETE key on your keyboard.