To view HDL-specific documentation for a block in your model, either:
In the Apps tab, select HDL Coder. The HDL Code tab appears. Select the block for which you want to see the help documentation and then select HDL Block Properties. To view the block documentation, click Help.
Right-click the block and select HDL Code > HDL Block Properties. To view the block documentation, click Help.
You see the documentation in the Extended Capabilities > HDL Code Generation section of the block page in the product that owns the block. You can also find HDL-specific block documentation in Model Design.