How can you change a solid (continuous) line to a dashed line?
In the view in which you want an object changed to dashed lines type VV. This will bring up the ""Visibility/Graphics Overrides"" dialogue box. The column on the left lists all elements in the drawing. Select the element you want to change. In the second column from the left select the ""Override"" button. Pull down the drop-down list of line types under ""Pattern"" and select the ""Dash"" linetype, for example. This method will change the linetype to dashed for all objects of that type.
Select the ""Linework"" tool (looks like a fountain pen nib), select the type of line you want to turn the object into on the dropdown linetype list on the left (such as ""Hidden line""), then select the line of the object you want to change.