# Base
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Only users with role **Designer** or **Admin** can access and edit Base
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A template consist of the following elements:
* A Template [Base](#base)
* A series of [Blocks](#blocks)
* A series of [Inputs](https://documentation.alpaco.email/template/input-groups)
When [creating an email](https://documentation.alpaco.email/fundamentals/creating-an-email), the user first selects the name and which **Template** to use for that particular email. All the options, settings, design and [Blocks](#blocks) are all contained and confined within that template. The design rules are based on the universal language [Liquid](https://liquidjs.com/tutorials/intro-to-liquid.html) and opens up for immense possibilities.
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It's within and between the [Base](#base) and these [Blocks](#blocks), design-rules, data-rules and others are defined.
### Template Editor
The Template Editor wtih Left,- Center,- and Right panel
The **Template Editor** is divided into 3 panels:
* **Left panel** - is a menu where you can navigate between the [Base](#base) and [Blocks](https://documentation.alpaco.email/template/blocks). By Clicking the + button here you create a new [Block](https://documentation.alpaco.email/template/blocks).
* **Center panel -** this is where HTML, CSS and Liquid rules are inserted and highlighted.
* **Right panel -** this is where all [input types](https://documentation.alpaco.email/template/input-groups/input-types) are chosen, named, grouped and configured. From here you can insert different inputs like images, text, links and similar values.
### Base
The Base is the foundation of the Template. Think of it as the foundation or the wrapper, from which users can insert[ Blocks](https://documentation.alpaco.email/template/blocks) into. The Base consist of **HTML/CSS** and usually contains tags like `` and `` but also usually things shared across emails (such as a header with logo or a footer with social links).
The Base will always be found in the **Left panel** at the top.
#### Content Placement
Insert {{ blocks }} and give the Base a name and a key
1. Click the **Base** in the Left panel.
2. Insert your entire template code into the Center panel.
3. Scroll down into the template code in the Center panel and locate where, you in a moment, want to insert [Blocks](https://documentation.alpaco.email/template/blocks). There you **must** insert the following Liquid tag `{{ blocks }}`.
4. In the Right panel, Give the **Base** a compelling name, and a key, like "template", "foundation" or simply "base".
### Global variables
The global tab, found under the Base, is a tab created solely for global rules and styles to be used across **Base** and [Blocks](https://documentation.alpaco.email/template/blocks) governed from a centralized place.
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The tab allows for [JSON](https://www.json.org/json-en.html) formatted objects and does not come with any options for inputs. It's a developer-only list of objects to quickly control multiple values across the template.
Referencing your variables any places is done by the following prefix:
```liquid
{{global.variable-name}}
```
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The Global tab is excellent at managing any sort of brand defining settings like fonts, font-size, colors, margins, paddings and others that are repeated throughout your template.
### Block position logic
In Base, you have access to the **entire sequence of Blocks**. This lets you define logic across all positions — for example, detecting if a certain Block comes third, or inserting a design pattern every fourth block. Sometimes, you want a something in the Base appearance or behavior to change depending on the order in which a certain type of Block is listed.
This is where **Block Position Logic** comes in: a feature that allows to detect the position or sequence of Blocks, and create rules based on that.\
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The core concept here is that you have an array of Blocks. From here we can start creating rules.\
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Here are the variables:
```liquid
{% for item in base.all_blocks %}
{{ item }}
{% endfor %}
```
Put into practice we can then start to look for the Block name, and check if there ever comes a Block named "Article" as the last block in the array, make a change to the footer, so it neatly blends in with the rest of the design.
```liquid
{% assign last_block = base.all_blocks | last %}
{% assign is_article_last = last_block == "article" %}
{% if is_article_last %}
Background-color:#3a3b38;
{% endif %}
```
**Result**
{% hint style="info" %}
Want to listen to the sequence of Blocks — for example, to detect if a certain type of Block is before or after a specific type of Block and have design logic based on that?\
Check out how [Block Position Logic works](https://documentation.alpaco.email/blocks#block-position-logic) *inside* individual Blocks too.
{% endhint %}
