SFDC: How To

How To Remove 'New' Button from Related List on the Classic / Lightning / Community Page Layout?

Thought on sharing this, as it is a little bit hidden on :))
 Please not, that this will remove the "New" button, but it will not remove underlying functionality. If you want to remove overall new record creation functionality, you will need to update Profile itself, by removing related permissions to the object.

To remove the "New" button please go to 'Setup' and find an object for your page layout. Select 'Page Layout' option.

Screen Shot 2017-12-05 at 10.46.01.png

Click 'Edit' next to the Page Layout where you want to remove the 'New' button from.

Screen Shot 2017-12-04 at 11.43.22.png

Scroll down to Related lists, and click on the wrech icon.

Screen Shot 2017-12-04 at 11.43.36.png

Click on the '+' icon and deselect the 'New' checkbox. 

Screen Shot 2017-12-04 at 11.43.47.png

Please make sure that other Page Layouts are not selected in Column section, as otherwise this change will apply to all page layouts. Unless, this is what you want. :)

When done, please make sure to save changes to your page layout.