want to use Proteus make blocks missed parts why?

[laoadam]

I want to make the small parts of circuit into blocks, but not work, say three buttons make as one block, the result is missed other two.

 

[andre_luis]

Not clear what you did, but the 'subcircuit-mode' feature is likely what you need:

 

[laoadam]

Thank you.
Some times when I wiring device pin, it shown a red circle and refused, why?

 

[laoadam]

Thanks.

Watched the video, can you tell hot to modify attached drawing's mcp4261 section into sub-circuit?