# Projections Tool

Projections Tool plots horizontal and vertical projections of the current image

- Row/Column slice e.g. 9:10 or 100:120:2, <empty> for all
- Mapping: mean or sum
- Pixel intensity pointed by mouse and its position

The configuration of the tool can be set with a JSON dictionary passed in the `--tool-configuration` option in command line or a`toolconfig` variable of `LavueController.LavueState` with the following keys:

`mapping` (`sum` or `mean` string), `rows` (string with a python slice), `columns` (string with a python slice)

`` e.g.

`lavue -u projections -s test --tool-configuration \{\"mapping\":\"sum\",\"rows\":\"10:200:5\"``,\"columns\":\"50:150\"\} --start`