There are 2 ways to Collapse or Expand Your Modules:
Single Module
Click the down-facing triangle
This will compress all the Module contents and hide them from view
Click that down-facing arrow once more and your Module will unpack to appear in full view again.
All Modules at Once
Click the COLLAPSE ALL button on the top right of your Module area
The button labeled COLLAPSE ALL has now switched to EXPAND ALL.
Click this to reverse your collapse command.