How can I make an edit on one page and have it affect our other pages?
Linked Blocks allows a Splash user to design and save a block that updates all pages that that block is on.
First, you will need to Save A Block. See here. Once you Save the block you can elect it to be a Linked Block.
Add the Saved Block to the Page. See here
Linked Blocks will be locked on all child pages that the block is on. You will not be able to make edits to the block on that event page.
We recommend that you create an event page dedicated to all your custom blocks and custom linked blocks. So that you have one event page that stores all your content.