> For the complete documentation index, see [llms.txt](https://janelia-flyem.gitbook.io/neutu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://janelia-flyem.gitbook.io/neutu/annotation/synapse-annotation.md).

# Synapse Annotation

![Synapse Glyphs](https://2926737796-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ld57Fj27nUB-NnjPb7c%2F-Lz9I68HwZ18ddh8WbJR%2F-Lz9MBoV8vZBkG-oLB4P%2Fimage.png?alt=media\&token=21a65135-d3fb-4765-bcef-48e55bc72729)

## Select a synapse

Click to select a synapse.

Ctrl/Cmd + Click to select more synapses or unselect a selected synapse

## Annotate/Edit synapses

### Annotate pre-synapses

Choose ‘Add Tbar’ from the tool menu or right click menu.
 

Click where you would like to place a pre-synapse glyph.

### Annotate post-synapse (also called PSD)

Choose the pre-synapse which you would like to link to PSDs.
 

Choose ‘Add PSD’ from the tool menu or right click menu.
 

Click where you would like to place a post-synapse. PSD will be automatically linked to the pre-synapse selected.

![Synapse Toolbar](https://2926737796-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ld57Fj27nUB-NnjPb7c%2F-Lz9MQeiENL26dFeyjHB%2F-Lz9Mdzk2qKb38ZckxVP%2Fimage.png?alt=media\&token=5e0fdf67-db42-4d8d-8bd2-3305518761f0)

### Delete a pre- or post-synapse

Select the pre/post synapse, and choose ‘Delete Synapse’ from the tool menu or right click menu, or press ‘X’ as a short cut key.

### Move a pre- or post-synapse

Select the pre/post synapse, and choose ‘Move Synapse’ from the tool menu or right click menu, or press ‘V’ as a short cut key.

### Manage the confidence and annotation

Double click the synapse. Window pops up to manage the confidence level (High or low/unsure) and annotations (add comment here).

![](https://2926737796-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ld57Fj27nUB-NnjPb7c%2F-Lz9Q9yN8-yYdmFWNc_K%2F-Lz9QnBTfrEyqr9uVXiR%2Fimage.png?alt=media\&token=0e0aba04-5d3f-4d2d-bced-ff0e6aa81202)