ABSTRACT
Now that we know how to draw lines and circles, we will investigate the aids which are available to the user. AutoCAD 2006 has several 2D drawing aids which are generally toggled on/off using the status bar buttons and include:
Grid
allows the user to place a series of imaginary dots over the drawing area
the grid spacing can be altered by the user at any time while the drawing is being constructed
as the grid is imaginary, it does not appear on the final plot.
Snap
allows the user to set the on-screen cursor to a pre-determined point on the screen
the snap spacing can be altered at any time by the user
when the snap and grid are set to the same value, the term grid lock is often used.
Ortho
an aid which allows only horizontal and vertical movement of the on-screen cursor
Polar tracking
allows objects to be drawn at specific angles along an alignment path
the user can alter the ‘polar angle’ at any time.
Object Snap
the user can set a snap relative to a pre-determined geometry
this drawing aid will be discussed in detail in a later chapter.
Dynamic Input
provides tooltip display information near the on-screen cursor
this information is updated as the cursor moves
the tooltip allows the user direct keyboard entry.