Overview
The Block Selection dialog lets you choose a block definition from the active drawing. It includes a live preview of the selected block's geometry alongside an alphabetically sorted list of available blocks.
How to Access
This dialog appears when using commands that require you to select a replacement block, such as ATREPLACE_BLOCKREFS.
Layout
A two-column window (500 x 400 pixels):
- Left column — Block preview area showing a graphical preview of the selected block
- Right column — Scrollable list of block names from the current drawing
Block Preview
A 125 x 125 pixel preview window that renders the selected block's AutoCAD geometry in real-time. The preview updates automatically when you click a different block in the list.
Block List
An alphabetically sorted list of all block definitions in the active drawing. The list excludes:
- Layout blocks
- External reference blocks
- Overlay reference blocks
Select a block by clicking its name. The first block is automatically selected when the dialog opens.
Buttons
| Button | Action |
|---|---|
| Apply | Confirm the selected block and close |
| Cancel | Close without selecting a block |
Tips
- Double-click a block name to select it immediately (equivalent to selecting and clicking Apply)
- Only blocks defined in the currently active drawing are shown
- If no blocks are available, the list appears empty
Related Commands
-
Replacing Block References —
ATREPLACE_BLOCKREFS -
Editing Project Block Definitions —
ATEDIT_PROJECT_BLOCK_DEFINITIONS
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