The bar at the very top shows your Publish button, as well as other options such as the page you are on, the Theme you are on, versions and a shortcut to the front-end page.
Here is a guide to what they are:
Breadcrumbs
Where it says BlockLab > then the page name, these are called Breadcrumbs. By clicking on BlockLab, it will take you back to the BlockLab selection page, rather than going back through to your account.
Your Site
A link that opens a new tab to your website. This will show how your website looks on the live page.
Versions
Ever had it where you changed an entire layout, saved & published, and then wanted to revert back to the last one? This is where Versions will benefit you. Similar to undo and redo, pressing the left or right arrows can guide you through your design history. The fast forward button will take you to your most recently saved/published design.
Save/Publish
The Publish button is self-explanatory. It will publish the design to your website. However, as you continue to make changes, BlockLab will automatically save your work in the background, but will not publish it until you press Publish.
