Either F9 or CONTROL and B
CONTROL
256 layers
text is displayed but not mirrored
Zoom 0.5x
Blocks can only be inserted into a drawing if they already exist in that drawing.
30<81
SPLINESEGS
0,0/20000,15000
255
%%u
make it invisible and prevent regeneration
ZOOM DYNAMIC
STYLE
UCS
MATHC
1:5
(@)
the pair of coordinate points which define the lower left and upper right corners of the drawing boundary
change the values of the system variables
The space is always an alternative to the enter key.
rectangle
all commands issued since the drawing was last loaded into the drawing editor
SETVAR
Mirrored
ZOOM ALL makes all objects visible irrespective of the layer visibility state.
Picks the previously picked group of objects
%%c
a me of setting the initial drawing environment for new drawings
ACAD.PGP
it converts 2D drawings to 3D
speed up drawing regeneration by replacing text with rectangles
ATTDIA
1:10 in A4 size drawing