You can draw different kinds of sketch objects (graphical objects) in your drawings (lines, rectangles, polylines, polygons, arcs, circles) and use the sketch objects for highlighting particular spots of interest, for example. Use the properties dialog boxes of different sketch objects to check and change the appearance of the shapes.
To open the properties dialog box of a sketch object, go to the Drawings tab, hold down Shift and click the sketch object command. When you have added a sketch object in a drawing, you can open its properties by double-clicking the object.
The settings you have in the dialog box vary depending on the sketch object type.