If you have a group of components that you wish to place in the drawing area repeated times, e.g. a group of workstations, you can save one group as a block before copying it. The advantage of using a block is that all modifications that are made in one block in the drawing area will affect all other blocks of the same type

For example, if you would like to change the width of worksurfaces at all workstations in a room, you just need to change the width in edit block mode and all worksurfaces will be changed.

Creating blocks

Follow the steps below to create a block from scratch:

1. Select the group of components in the drawing area that you wish to save as a block.
2. Go to the Tools menu and select Create block, or right click on the group of components and select Create block.
   
   The keyboard shortcut to create a block is Ctrl + B.
3. In the green properties box, you can rename the block, or open the Blocks dialog. 

Modifying blocks

Blocks function as one individual object in the drawing view. It will behave the same whether you are in group or single select mode. To make changes to a block, you will need to be in Edit Block Mode. In Edit Block Mode, you will only see the contents of the block, and your 2D view will have a blue-ish background. All modifications made in this mode will affect the other blocks in the drawing area that are of the same type. You can access Edit Block Mode by:

• Double clicking the block in the drawing area that you wish to modify. 
• Right-clicking on the block and choosing Edit block from the context menu.
• Select the name of the block in the Blocks dialog and click the "Edit" button.

To exit Edit Block Mode and return to the drawing, click on "Drawing" in the upper right hand corner of the 2D or 3D drawing view, next to the name of the block.

Modifying Blocks within Alternatives

When using Blocks within Alternatives, all instances of the specific block will update across the alternatives. If you have a block that needs to be specific to an alternative, instead of shared across them, you can clone a block. When you have blocks that are shared across alternatives, a warning will be displayed when you enter Edit Block Mode.