## Single symbol classification <a id="single-symbol-classification"></a>


__🔙[Back to Homepage](../intro.md)__


- By default, QGIS visualizes all layers in the `Single symbol` setting.
-  This means all the features of a layer are visualised the same. 
- In this setting, you can change many parameters like colour or opacity __but you can't classify any data!__


__To adjust the style of a layer...__
- Right-click on your layer.
- Click on `Symbology`.
- Confirm that the layer setting is on `Single Symbol`.
- Select the colour of your choice in the drop-down menu. For more colour options select in the drop-down menu `Choose Color`.
- *Optional*: You can adjust the opacity/ transparency of the layer. This can be very useful when you want to show multiple overlapping layers.
- *Optional*: Here you can set the unit type. This is useful when you want to, for example, visualise points in a certain size.
- Optional. Here you can find standard and previously used styles quickly.
- Click `Apply` to put your adjustment into effect.
- Click `OK` to close the window.

:::{figure} ../../../fig/Single_symbol_classify.png
---
width: 900px
name: Single_symbol_classify_wiki
align: center
---
:::

%% EDIT: The green numbers are not so easy to read. Switch to red numbers.

<video width="900%" controls src="https://github.com/GIScience/gis-training-resource-center/raw/main/fig/Single_symbol_video.mp4"></video>