To "open a block" in AutoCAD typically refers to accessing its definition for editing. This is done using the dedicated Block Editor.
Accessing the AutoCAD Block Editor
The AutoCAD Block Editor is a specialized environment where you can modify the geometry, properties, and parameters of a block definition. Opening the Block Editor allows you to make changes that will be reflected in all instances of that block within your drawing.
You can open the Block Editor using one of the following methods:
- Via the Home Tab:
- Navigate to the Home tab on the Ribbon.
- Look for the Block panel.
- Click the (Block Editor) button.
- Via the Insert Tab:
- Go to the Insert tab on the Ribbon.
- Find the Block Definition panel.
- Click the (Block Editor) button.
As stated in the reference, clicking (Block Editor) in the Home tabBlock panel or in the Insert tabBlock Definition panel opens the Edit Block Definition dialog box.
Selecting the Block to Edit
After clicking the Block Editor button using either method, the Edit Block Definition dialog box will appear. This dialog box lists all the block definitions currently available in your drawing. You will need to select the specific block name you wish to open and edit from this list and then click "OK".
Once you select a block and confirm, AutoCAD will switch to the Block Editor environment, indicated by a grey background and a context-sensitive Ribbon tab (Block Editor tab).
