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- 3.2.1 DEFINE SHEET
-
-
- The DEFINE SHEET command is used to redefine the current SHEET viewport size
- and units.
-
- The sheet viewport is the overall drawing area available to any X-CAD
- drawing, it is analogous to a sheet of paper hence the name. It is impor-
- tant to choose the correct sheet size as like on a conventional drawing
- sheet, no entities can be created or moved outside of the sheet area.
-
- The sheet size chosen should reflect the actual size of any plotted output
- and not the true size of the drawing. To create a drawing that would be
- much larger than any workable sheet size - if drawn at full size without
- manual scaling - the recommended procedure is to define a viewport within
- the sheet to suit the particular application. As a secondary viewport may
- have an independent scale and independent unit types, this leads to a more
- intuitive way of dealing with scaled drawings.
-
- Defining a new sheet size should always be the first command to use when
- creating a new drawing. Once any entities are created in the sheet viewport,
- the existing sheet cannot be redefined without first deleting the current
- drawing.
-
- The origin of the sheet viewport is always in the bottom left-hand corner.
- To create a drawing with an offset origin, a secondary viewport must be
- defined within the sheet viewport.
-
-
- MODIFIERS
-
- ISO Allows one of several predefined drawing sheet sizes to be
- chosen that conform to the ISO standard. The available options
- are:
-
- A0 1189 by 841 millimetres.
- A1 841 by 594 millimetres.
- A2 594 by 420 millimetres.
- A3 420 by 297 millimetres.
- A4 297 by 210 millimetres.
-
- The default units for ISO sheet sizes are millimetres. The
- default orientation of the sheet is longest side horizontal.
-
- .UNITS Allows a choice of metric units to be used with an ISO size
- sheet:
-
- MM Millimetres.
- CM Centimetres.
- M Metres.
-
- .VERTICAL If this modifier is entered, the sheet will be oriented with
- the longest side vertical.
-
- BS Allows one of several predefined drawing sheet sizes to be
- chosen that conform to the BS standard. The available options
- are:
-
- B1 39.5 by 27.75 inches.
- B2 27.75 by 19.75 inches.
- B3 19.75 by 13.87 inches.
- B4 13.87 by 9.87 inches.
-
- The default units for BS sheet sizes are inches. The default
- orientation of the sheet is longest side horizontal.
-
- .UNITS Allows a choice of imperial units to be used with a BS size
- sheet:
-
- IN Inches.
- FT Feet.
-
- .VERTICAL If this modifier is entered, the sheet will be oriented with
- the longest side vertical.
-
- ANSI Allows one of several predefined drawing sheet sizes to be
- chosen that conform to the ANSI standard. The available options
- are:
-
- A 11.0 by 8.5 inches.
- B 17.0 by 11.0 inches.
- C 22.0 by 17.0 inches.
- D 34.0 by 22.0 inches.
- E 44.0 by 34.0 inches.
-
- The default units for ANSI size sheets are inches. The default
- orientation of the sheet is longest side horizontal.
-
- .UNITS Allows a choice of imperial units to be used with an ANSI size
- sheet:
-
- IN Inches.
- FT Feet.
-
- .VERTICAL If this modifier is entered, the sheet will be oriented with
- the longest side vertical.
-
- CUSTOM Allows a custom drawing sheet to be defined.
-
- .WIDTH A real value defining the width of the drawing sheet.
-
- .HEIGHT A real value defining the height of the drawing sheet.
-
- .UNITS Allows a choice of units to be used with the drawing sheet:
-
- MM Millimetres.
- CM Centimetres.
- M Metres.
- KM Kilometres.
- IN Inches.
- FT Feet.
- ML Miles.
-
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