# Top bar

<img src="/files/fqZYFOUlMRSoeimGhlHk" alt="The top bar in the Access user interface." class="gitbook-drawing">

The top bar is visible on every page. It contains status information about your BactoBox® such as:

* Flow cell currently in your BactoBox®
* Connection from your computer to your BactoBox®
* Connection from your computer to SBT's cloud service (Nucleo)
* System information. E.g., device name, hardware version, and software version.

## Status indicators

The right part of the top bar shows various *status indicators*. Usually, a status indicator is just a single icon. Sometimes, the status indicator also includes a short text.

Some status indicators contain additional details. Hover your cursor over the status indicator to reveal the additional details in a tooltip.

### Flow cell

The text is *Remaining measurements* / *Max measurements* of the current [flow cell](/encyclopedia/item-register/consumables/flow-cell.md). E.g., something like 241/250 if you used up 9 measurements already.

The tooltip also shows the flow cell ID.

**BactoBox® hides the flow cell status indicator when there is no flow cell installed.**

<img src="/files/zq30rl2MhC6H3d8YJzsw" alt="Flow cell status indicator with both text and an icon. Hover to reveal a tooltip that shows the flow cell ID." class="gitbook-drawing">

### Device connection

Lights up whenever Access communicates with your BactoBox® device. If this icon lights up regularly, this indicates that the connection works.

<figure><img src="/files/Xo9QKIGzA02tnvUgNMLU" alt=""><figcaption><p>Device connection status indicator.</p></figcaption></figure>

### Nucleo connection

Lights up whenever Access communicates with Nucleo (our cloud service). This indicates that the connection works. If this icon lights up regularly, this indicates that the connection works.

<figure><img src="/files/7DxHAIkEyslG1Eva7Pjf" alt=""><figcaption><p>Nucleo connection status indicator.</p></figcaption></figure>

## System info

The tooltip shows information about your BactoBox®:

* [Hostname](https://en.wikipedia.org/wiki/Hostname)
* Hardware version
* Software version

<img src="/files/McxJpLcAsUyhgV34eTYs" alt="System info status indicator. Hover to reveal hostname, hardware version, and software version." class="gitbook-drawing">

<div data-with-frame="true"><figure><img src="/files/S2TnsR7671DxfGE6ZZKU" alt=""><figcaption><p>Press the <i class="fa-bars">:bars:</i> <em>Menu</em> icon to show/hide the page navigation.</p></figcaption></figure></div>

Press the <i class="fa-bars">:bars:</i> *Menu* icon in the top left (inside the top bar) to show/hide the [page navigation](/encyclopedia/software/access/components/page-navigation.md). This is useful on small displays because it gives more room for the page content itself.


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