How do I delete all in AutoCAD?

To delete all objects in AutoCAD, use the ERASE command and then select the "All" option.

Here's a step-by-step guide:

1. Start the ERASE command: Type ERASE or E in the command line and press Enter.
2. Select Objects: At the "Select objects:" prompt, type ALL and press Enter. This will select all objects in the current drawing space.
3. Confirm Deletion: AutoCAD will then prompt you, often displaying how many objects were selected. Simply press Enter again to confirm the deletion. This will erase all selected objects.

Alternatively, you can also use the following sequence:

1. Type ERASE or E and press Enter.
2. Type ALL and press Enter.
3. Type Y (for Yes) to confirm the erase command when prompted "Erase all?" and press Enter.

Important Considerations:

• Layers: The above commands will erase all objects regardless of the layer they are on. If you only want to delete objects on specific layers, you would need to first isolate those layers using the LAYISO command or freeze the layers you want to keep.
• Locked Layers: If you have objects on locked layers, these objects may not be erased unless you unlock the layer first.
• Regen: After erasing a large number of objects, it's a good practice to type REGEN and press Enter to regenerate the drawing. This ensures that the display is updated correctly.
• Undo: Remember that you can use the UNDO command (type U and press Enter) to reverse the ERASE operation if you make a mistake.