How to reverse the union order in Autocad



To automatically flatten a drawing in AutoCAD:

Use the command FLATto change the z-values ​​of all lines, arcs, and polylines to 0
  1. Uncheck or freeze any hatch layers so they are not included in the selection.
  2. Give FLATTEN in the command line.
  3. Select all of the objects and press ENTER.
  4. Give N for No when prompted to remove hidden lines.
  • To FLATE, Express Tools must be loaded.
  • While it is possible to select and flatten all elements in a drawing at the same time, you may need to use the OSELECT command to select each group of object types and then use the FLATTEN command to select them.
Use the command for 3D objects FLAT or SOLPROFILEto create 2D views.
  • Substitute the z-value for 3D objects in layout viewports.
    1. At the command line, type OPTIONS a.
    2. On the Design> pacteraconchar Object Snap Options tab, select Replace z-value with current loft.

To flatten a drawing manually or in AutoCAD LT:

  1. Open the Properties palette in AutoCAD.
  2. Use the quick selection or the command SELECTIONto select objects by type (see Selecting Objects in an AutoCAD Drawing Using the Quick Selection).
  3. On the Properties palette, find the values ​​for Beginning of Z., End of Z. and Middle Z (for certain shapes) and change them each to any integer except 0 (zero).
  4. Change the value to 0 (zero). (This corrects all values ​​that contain more than 8 decimal places and are not visible in the Properties palette.)
    Annotation: To use this method with certain objects such as blocks and groups, they must first be resolved.

Alternative to changing the z-value of objects to zero:

Use the CHANGE command:
  1. Give the commandTO CHANGE a.
  2. Give ALL to select all objects, then press Enter.
  3. Give P. for properties.
  4. Give E. for elevation.
  5. Give 0 and press Enter again to complete the command.
annotation: This option does not work with complex objects such as 3D objects.

To flatten a drawing using LISP, macros, and scripts:

You can flatten a drawing by including one or both of the following LISP routines on the command line in AutoCAD.
  • This command changes the elevation of all objects to 0 (zero):
(command "_change" "_ all" "" "p" "e" "0" "")
  • The second command moves the objects very high and then back down to 0 (zero):
(Command "_move" "_ all" "" "" "0,0,1e99" "_ move" "_ all" "" "" "0,0, -1e99") Macros can be assigned to the CUI buttons in AutoCAD and AutoCAD LT.
  • To flatten selected objects:
^ C ^ C_UCS ;; _ select; \ _ move; _p ;; 0,0,1e99 ;; _ move; _p ;; 0,0, -1e99 ;;
  • To flatten the entire drawing:
^ C ^ C_UCS ;; _ move; _all ;; 0,0,1e99 ;; _ move; _all ;; 0,0, -1e99 ;; The zip file attached to this article is a script file that can be run in AutoCAD and AutoCAD LT. The height of all objects in the drawing is removed.

How to Use SCRIPT (Command)

  1. Start AutoCAD LT.
  2. Open a construction drawing.
  3. At the command prompt, enter script.
  4. In the Select Script File dialog box, navigate to and select the saved script file.
  5. Select "Open".
  6. The script processes the commands.
  7. Save the drawing.

To flatten a drawing using PDF or DXB export:

Follow the steps below:
  1. Plot a PDF or DXB file.
  2. Import this file into a new or existing drawing using PDFIMPORT. The geometry is flattened.
  • To create a DXB file, you must first start with the Adding a plotter wizard create a DXB PC3 printer. Give the command PLOTTER MANAGER to open the folder that contains the wizard.
  • In AutoCAD 2017 and newer versions, the command is available PDFIMPORT to disposal.
  • The DXB plotter converts all color data to black and white and places all drawing geometry on layer 0.
  • Colors and layers are preserved in a PDF file as long as a plot style with color is specified and the PDF layer option is selected when the PDF is created.

When objects are far from the origin (0,0,0), move objects closer to the origin.


AutoCAD for Mac, AutoCAD LT, AutoCAD, AutoCAD LT for Mac