The following layers can't be deleted:

1. Find Blocks In Autocad
2. Autocad Delete Block Command
3. Delete Block Autocad 2019

มีบล็อกที่เราต้องการซึ่งจะมีที่ติดมากับ AutoCAD.

1. Layer 0 and Layer Defpoints that are default layers.

1. To purge blocks, use one of the following methods: To purge all unreferenced blocks, select Blocks. To include nested blocks, select Purge Nested Items. To purge specific blocks, double-click Blocks to expand the Block tree view.
2. If your block in used in the drawing.you can’t delete it from insert list.but you can directly delete selected block from drawing. To delete Block from Insert List,You have to use purge command.but if your block used in drawing.you can’t delete from list.you have to explode or delete all the blocks then after you purge the block.

2. The current active layer. To delete the layer, you have to shift to another layer, or just set another layer as the current active layer.

Find Blocks In Autocad

3. Layers containing any object

• In the first case where there are entity objects on this layer, execute qselect command, select all the objects on the layer, and move them to another layer, or just delete them.
• In the second case where there is no entity object on this layer, or the above action has been taken, but the layer still can't be deleted, the graphics on the layer might probably incorporated into a block, so you have to open the block editor, and move the graphic elements to another layer. The problem is, if there are many blocks, how can we identify the right block and the graphic elements? Solution: hide or freeze all objects in the drawing, and insert all blocks into another layer, decompose (explode or break up) all of them, and use the mouse to frame them up, check the layer information to identify the elements on the layer to be deleted. Then redefine the block, or modify it in the block editor. So it's better to apply Layer 0 when creating a block.

Autocad Delete Block Command

• If there is a block on the layer or if objects (such as blocks) are referencing the layer, when you insert a graphic after a block is created, and then you explode or delete it for some reason, even you delete all the visible graphical elements from this layer, you still can't delete the layer, as there are other hidden elements (such as blocks) on the layer. There are two ways to delete the layers of this kind:

Delete Block Autocad 2019

• Use the PURGE command (shortcut keys 'pu') which can be used to clear out nearly all hidden elements, including dimension style, printing style, multiline style, blocks, layers, text style, linetype and graphics. First use the command to clear out the blocks and hidden elements that are no longer required, and then delete the layer. Now the layer can be directly deleted.
• As for the layers that still couldn't be deleted after the PURGE command is executed, you have to open the additional CAD menu 'Express', and use the 'laymrg' command to combine the layers. The 'laymrg' command can integrate a layer into another layer, making it totally disappear. In this way, the layer is indirectly deleted! This command can be used to delete any layer, no matter whether there is any other graphical element.

4. Xref-dependent layers: use the laydel command to delete these layers