# Charts & Diagrams
Using [fields-html-support](https://docs.documentero.com/documentation/templates/fields-html-support "mention") or [fields-mermaid-support](https://docs.documentero.com/documentation/templates/fields-mermaid-support "mention") you can add simple and complex charts, diagrams and other elements based on data passed during document generation.
**Check Mermaid Tutorials & Syntax** -
**Pie Chart**
```
pie title Pets adopted by volunteers
"Dogs" : 386
"Cats" : 85
"Rats" : 15
```
**Sequence Diagram Example**
```
sequenceDiagram
Alice->>John: Hello John, how are you?
John-->>Alice: Great!
Alice-)John: See you later!
```
#### Chart XY
```
---
config:
xyChart:
width: 900
height: 600
themeVariables:
xyChart:
titleColor: "#ff0000"
---
xychart-beta
title "Sales Revenue"
x-axis [jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec]
y-axis "Revenue (in $)" 4000 --> 11000
bar [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
line [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
```
**Check more examples on Mermaid official documentation site** -
---
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```
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```
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