In Cognos Analytics 12: is it possible to adjust row size to Compact or Short for all users?

Greetings!

You can do it with a custom extension.

Invoke a JavaScript similar to:

document.querySelector('button[data-id="listView"]').click();
document.querySelector('button[data-id="settings"]').click();
document.querySelector('input[name="rowSize"][value="short"]').click();
document.querySelector('button[data-id="settings"]').click();

@Tim Aston might suggest a more robust approach

You can also modify the JavaScript file on the server:

webcontent\bi\js\ca-content\content\content.js

But then you have to repeat this modification  after every Cognos upgrade